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|---|---|---|---|---|---|
help! i cant figure out this problem for the life of me!
4/9(x+3)=g solve for x. state any restrictions on the variables.
1. multiply both sides by 9/4 2. subtract 3 from both sides you're done.
Is your question $g = \frac{4}{9(x+3)}$ Given: $g = \frac{4}{9(x+3)}$ Multiply by (x+3) on both sides: $g(x+3) = \frac{4}{... | 4 | [
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... | 31,400 | 31400 | |
Slope Fields
December 9th 2012, 07:13 PM #1
Junior Member
Joined
Nov 2012
From
New Jersey
Posts
31
Slope Fields
Differential Equation dy/dx= 1/y: describe properties of this equation and their effect on the slope field that represents the family of solutions to this DE
Re: Slope Fields
What do ... | 5 | [
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Homework Help
Posted by ali on Tuesday, December 8, 2009 at 2:29pm.
hi!
how would you figure out a problem where you are given a probability of success for 12 people and you are trying to find the probability of success for 1 person?
• probability - economyst, Tuesday, December 8, 2009 at 5:42pm
Can you assum... | 5 | [
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Sum of squares
October 19th 2008, 06:16 AM #1
Sum of squares
Prove that there are infinitely many positive integers $n$ such that $n(n + 1)$ can be expressed as a sum of two positive squares in at least two different ways. (Here $a^2 + b^2$ and $b^2 + a^2$
are considered as the same representation.)
Hint... | 5 | [
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... | 31,403 | 31403 | |
Homework Help
Posted by j on Monday, October 15, 2012 at 9:35pm.
A water trough is 4 m long and its cross-section is an isosceles trapezoid which is 210 cm wide at the bottom and 280 cm wide at the top, and the height is 70 cm. The trough is not full. Give an
expression for V, the volume of water in the trough in cm^3... | 4 | [
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Perimeter Area
October 4th 2008, 07:00 PM #1
Perimeter Area
What are the measures of a base and height of a triangle that has an area of 12 square centimeters and a perimeter of 16 centimeters?
Thanks
A triangle with sides of 5, 5, and 6 satisfies your conditions. Answer: height of 4 and base of 6.
... | 4 | [
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0.042... | 31,405 | 31405 | |
Verifying the diagonalizability of a 2x2 matrix with rank 1
December 2nd 2010, 05:53 PM #1
Newbie
Joined
Oct 2009
Posts
22
Verifying the diagonalizability of a 2x2 matrix with rank 1
Hello,
If A is a 2x2 matrix with rank 1, and one eigenvalue is known to be nonzero, then is A diagonalizable? I think... | 5 | [
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Proposition 60
Lemma.
If a straight line is cut into unequal parts, then the sum of the squares on the unequal parts is greater than twice the rectangle contained by the unequal parts.
Let AB be a straight line, and let it be cut into unequal parts at C, and let AC be the greater.
I say that the sum of the squares o... | 5 | [
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classic inequality
January 4th 2008, 06:54 AM
DivideBy0
classic inequality
Prove that if x, y, and z are positive real numbers, then
$\frac{x}{y+z}+\frac{y}{z+x}+\frac{z}{x+y} \geq \frac{3}{2}$
I haven't done much with inequalities so please explain your steps, thanks!
January 4th 2008, 09:47 AM
Isom... | 5 | [
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Physics - Electromagnetism
Posted by Robert on Wednesday, July 25, 2012 at 2:17pm.
This is the last question for a final exam preparation sheet and I can't figure out the answer. Any help would be greatly appreciated. Thank you.
- One very long wire carries current 10.0 A to the left along the x axis. A second very l... | 5 | [
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HPC² Publications :: Numerical Grid Generation :: Foundations and Applications
Numerical Grid Generation
Foundations and Applications
By: Joe E. Thompson, Z.U.A. Warsi and C. Wayne Mastin
X. CONFORMAL MAPPING
I... | 4 | [
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Quick Proof on real numbers
September 14th 2011, 06:36 PM #1
Member
Joined
Sep 2010
Posts
151
Thanks
1
Quick Proof on real numbers
For all positive real numbers x, (xˆ2)-x≥0.
I don't think this is true since for instance x can equal 2/3 and (2/3)ˆ2-(2/3)=-2/9 which is not greater than or equal t... | 4 | [
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... | 31,411 | 31411 | |
Future Worth Method Problem
October 9th 2008, 01:32 PM #1
Newbie
Joined
Sep 2008
Posts
9
Future Worth Method Problem
Your uncle has almost convinced you to invest in his peach farm. It would require a $10,000 initial investment on your part. He promises you revenue (before expenses) of $1800 per year the... | 5 | [
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3-bar equation
September 23rd 2010, 09:40 PM
scifo
3-bar equation
Hi(Hi)
I ask for a cartesian equation of 3-BARS CURVE...(Wait)
Or at least the parametric equation...(Wait)
Or at least the polar equation...(Wait)
Help me, please(Doh)
September 24th 2010, 05:35 AM
Ackbeet
What in tarnation... | 5 | [
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The Definite Integral, how it relates to the area under the curve and summations.
March 19th 2012, 07:45 PM #1
Newbie
Joined
Mar 2012
From
Missouri
Posts
2
Hello fello mathematicians,
I have been learning calculus recently for the first time, independently, and I have hit a wall. In studying the d... | 5 | [
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Quadratics and other Polynomials
May 11th 2013, 06:43 PM
dumbblonde
Quadratics and other Polynomials
Two electic poles AB and DC are 50m high and 100m long apart. An electrical wire is suspended between B and C and it assumes the shape of a parabola under its own weight. The maximum sag at the
middle is 10m.... | 4 | [
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Linear Transformations
November 11th 2008, 03:13 PM
Hellreaver
Linear Transformations
I have to either show that a transformation is either linear or not due to the additivity or the homogeneity.
The first question is:
T(x,y)=(x+1,y)
I answered:
T(x)+T(y)= mx+my
m(x+1)+my= mx+m +my
mx+... | 4 | [
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0... | 31,416 | 31416 | |
Homework Help
Posted by Jessica on Thursday, April 12, 2007 at 8:26pm.
Can someone check my work please?
Convert each polar equation to a rectangular equation. Then determine the graph's slope and y-intercept.
( I'm going to type 'x' instead of theta )
r sin(x- pi/4)=2
r(sin(x- pi/4))=2
r(sinx*cos pi/4 - sin pi/4... | 4 | [
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Approximate Solutions for Local Fractional Linear Transport Equations Arising in Fractal Porous Media
Advances in Mathematical Physics
Volume 2014 (2014), Article ID 487840, 8 pages
http://dx.doi.org/10.1155/2014/487840
Research Article
Approximate Solutions for Local Fractional Linear Transport Equations Arising in ... | 5 | [
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Combinatorial proof of a binomial identity
November 11th 2008, 10:57 PM #1
Combinatorial proof of a binomial identity
Hi, I'm trying to combinatorially prove the following identity:
$\sum_{i=0}^{r} \binom{n+i}{n}=\binom{n+1+r}{n+1}$
On the right side, $\binom{n+1+r}{n+1}$ is the number of ways we can ch... | 5 | [
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Math Help
December 17th 2007, 11:29 PM #1
Newbie
Joined
Dec 2007
Posts
4
summations
my teacher was in a rush at the end of the class and he literally only spent 5 minutes on summations, so i'm kinda confused here.
Evaluate:
10
Σi(i^2+1)
i=1
Evaluate:
10
Σk(k- 2)(k+2)
k=1... | 5 | [
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Work rate problem
July 8th 2013, 10:59 AM
usre123
Work rate problem
Mary wraps 5 parcels in 2 minutes while Kerry unwraps a parcel every ten minutes. If both work together how long will it take them to have 120 wrapped parcels ready?
A) 5 mins
B) 10 mins
C) 20 mins
D) 35 mins
E) 50 mins
July... | 4 | [
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Multiply matrix
September 19th 2009, 03:18 AM #1
Member
Joined
Sep 2007
Posts
222
Multiply matrix
How too multiply 2 rotational matrices like this:
R(THETA2) . R(THETA1) = R(THETA1 +THETA2)
How would that look given the rotation matrix:
cos(THETA) -sin(THETA)
sin(THETA) COS(THETA)
L... | 4 | [
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-... | 31,422 | 31422 | |
[SOLVED] few trigonoetetry questions
March 4th 2007, 03:56 PM #1
Tryptophan
Guest
[SOLVED] few trigonoetetry questions
im reviewing for an upcoming test and im having alot of trouble with these problems. any help would be greatly appreciated.
---------------
---------------
I'll do the first and ... | 4 | [
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Intusoft Newsletter, July 2005
Where
N is the number of turns
1.0 L is the inductance
i is current
t is time
It’s convenient to define the magnetic field,
And flux density as,
Ampere’s law, derived from Maxwell’s equations states:
where F is the magneto-motive force ... | 4 | [
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cl
Background
A reader from Africa, Magnar, recently asked about running a string in a spiral around a parabolic dish, as illustrated in the following image:
Magnar wanted to know how to calculate the length of such a spiral.
There’s an interesting story behind Magnar’s question. He builds parabolic dish cookers in ... | 5 | [
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... | 31,425 | 31425 | |
Trigonometry
Find the supplement of the radian measure 7 π /8. Express your answer in terms of π .
Remember a while back when you had, say, 36 degrees; and you had to find the supplement ? You set up this equation: $36 + x = 180$ And then solved for $x$. We do the same, except now it's gonna be in
terms of $\pi$. So: ... | 4 | [
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Modular Multiplicative Inverse
The modular multiplicative inverse of an integer a modulo m is an integer x such that $a^{-1} \equiv x \pmod{m}.$
That is, it is the multiplicative inverse in the ring of integers modulo m. This is equivalent to $ax \equiv aa^{-1} \equiv 1 \pmod{m}.$
The multiplicative inverse of a mod... | 5 | [
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0.07666015625,
-0.0068359375,
-0.049560546875,
-0.001983642578125,
0.0299072265... | 31,427 | 31427 | |
Real Solutions,
March 28th 2009, 06:04 AM #1
Junior Member
Joined
Jan 2009
Posts
57
Real Solutions,
Hi,
The graph $y=\frac{2}{x^2}+x^4$ has four real number solutions for values of $y > 3$.
I can draw the graph using my math tools, but this is quite a stinker to try and graph by hand.
I wa... | 4 | [
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0.09375,
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Distance problem
July 10th 2011, 05:00 PM
theloser
Distance problem
A man bicycles 5.4 mph faster than he can walk. He bicycles a distance of 32.4 miles and then hikes back along the same route. If the entire trip takes 12.6 hours, how fast does he walk?
Equation: let x= walk rate
$\frac{32.4}{x}+\frac{... | 4 | [
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0.0537109375,
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0.07763671875,
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0.0153198... | 31,429 | 31429 | |
the encyclopedic entry of population parameter
Quantiles are points taken at regular intervals from the
cumulative distribution function
of a
random variable
. Dividing ordered data into
q
essentially equal-sized data subsets is the motivation for
q
-quantiles; the quantiles are the data values marking the boun... | 4 | [
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-0.01818847... | 31,430 | 31430 | |
maths --plse help me..
Posted by Meenakshi on Thursday, December 13, 2012 at 12:22pm.
The angle of elevation of the top of a tower as observed from a point on the ground is alpha and on moving a meters towards the tower, the angle of elevation is beta .prove that the height of the
tower is a (tan alpha*tan beta)/(tan ... | 4 | [
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0... | 31,431 | 31431 | |
Arrangements.
February 10th 2010, 04:01 PM #1
Junior Member
Joined
Feb 2009
Posts
31
Arrangements.
Thanks in advance for the assistance!
1) Farmer John has 9 prize winning cows. How many ways can he choose 3 of his cows to show at the state fair?
Is it as simple as "9 C 3", 9 choose 3, on the c... | 4 | [
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-0.... | 31,432 | 31432 | |
A New High-Order Approximation for the Solution of Two-Space-Dimensional Quasilinear Hyperbolic Equations
Advances in Mathematical Physics
VolumeΒ 2011Β (2011), Article IDΒ 420608, 22 pages
http://dx.doi.org/10.1155/2011/420608
Research Article
A New High-Order Approximation for the Solution of Two-Space-Dimensional ... | 5 | [
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Homework Help
A large painting in the style of Rubens is 3 feet longer than it is wide. If the wooden frame is 12 in wide and the area of the picture frame is 208 ft^2, find the dimensions of the painting.
• PRE-CALC - Reiny, Friday, October 16, 2009 at 10:11pm
the width of the painting would be x-2 feet (12 in... | 4 | [
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0.0048828125,
-0.0673... | 31,434 | 31434 | |
Vectors: Find the length and direction of u * v
November 14th 2010, 11:43 AM #1
Newbie
Joined
Nov 2010
Posts
11
Vectors: Find the length and direction of u * v
Sorry I meant x not *
I need to find the length and direction of u x v, and I have:
u = i x j
v = j x k
So first I will find:
... | 4 | [
-0.0225830078125,
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0.0179443359375,
-0.05078125,
0.07... | 31,435 | 31435 | |
compute the angle between the vector and the plane
October 1st 2009, 05:12 PM #1
Junior Member
Joined
Apr 2008
Posts
43
compute the angle between the vector and the plane
compute the angle between the vector u = [1, 2, 3] and the plane
2x + 3y - z = 5
this one is really stumping me, I am not eve... | 5 | [
-0.045166015625,
0.005645751953125,
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-0.09375,
-0.060302734375,
-0.02026... | 31,436 | 31436 | |
Simulated Power/Precision Analysis
February 21, 2013
By BioStatMatt
I cringe when I see research proposals that describe a sophisticated statistical approach, yet do not evaluate this approach in their power/precision/sample size planning. It's often the case that a
simplified version of the proposed statistical app... | 5 | [
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0.03466796875,
0.0... | 31,437 | 31437 | |
RSA Encryption
October 18th 2006, 08:34 AM #1
Junior Member
Joined
Feb 2006
Posts
32
RSA Encryption
Hi,
Given that an RSA public key is (77,7).
How can I find the private key for this? Please could you show step by step, how this is done.
Thanks.
The RSA key generation algorithm is:
... | 5 | [
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-0.03198... | 31,438 | 31438 | |
Volume using integration ... Partial fraction decomposition
September 19th 2013, 08:32 PM
kyliealana
Volume using integration ... Partial fraction decomposition
Consider the region R bounded by y = 1 / (x^2 + 3x + 2) , x = 0, x = 1 and the x-axis.
Express your answer exactly with at most one logarithm in the... | 5 | [
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0.056640625,... | 31,439 | 31439 | |
I need to verify part of the proof involve Green's function.
September 12th 2010, 03:58 PM
yungman
I need to verify part of the proof involve Green's function.
This is actually a subset of proofing $G(\vec{x},\vec{x_0}) = G(\vec{x_0},\vec{x})$. Where G is the Green's function. I don't want to present the whole t... | 5 | [
-0.11083984375,
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0.046875,
0.0654296875,
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-0.038330078125,
-... | 31,440 | 31440 | |
Optimization
October 29th 2013, 04:19 PM
nubshat
Optimization
A Capybara needs to get from point A to point B around a circular pool (see diagram). If the Capybara swims half as fast as he can run, what angle should he jump in the pool to minimize the total
travel time?
Attachment 29625
I know that t... | 5 | [
0.0299072265625,
0.06494140625,
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0.047607421875,
-0.024169921875,
0.... | 31,441 | 31441 | |
Factor Theroem
May 24th 2012, 09:54 AM
user654321
Factor Theroem
Use the Factor Theorem to find the real number k such that (z – k) is a factor of z^3 + (-6 + 2j) z ^2 + (12 - 15j) z + (-9+27j)
Hence write z^3 + (-6 + 2j) z ^2 + (12 - 15j) z + (-9+27j) as the product of two factors.
Find all the solutio... | 5 | [
-0.1591796875,
0.041748046875,
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0.08984375,
0.060546875,
0.036865234375,
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-0.03125,
-0.061279296875,
0.06640625,
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0.048828125,
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-0.01348876953125,
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-0.04345703125,
0.042236328125,
-0.0... | 31,442 | 31442 | |
Homework Help
Posted by rmj on Saturday, February 14, 2009 at 9:10pm.
I'm having trouble getting the answer for the 2nd and 3rd questions.
# A soccer ball is kicked from the ground. When it reaches a height of 5.93 m, the velocity is v=6.45i+7.46j m/s.
1. Determine the maximum height that the ball reaches. (the righ... | 4 | [
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... | 31,443 | 31443 | |
Maths questions at GCSE level
June 3rd 2007, 01:58 PM
girliegal
Maths questions at GCSE level
Can someone help answer the following questions plzz
1)
The area of the pentagon is 8560mmsquared
Change 8560mmsquared top cmsquared
2)
Each side of another pentagon has a length of 101 mm,corre... | 4 | [
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0.1591796875,
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0.05078125,
0.0703125,
-0.07421875,
0.0458984375,
-0.0225830078125,
0.023681640625... | 31,444 | 31444 | |
Find all The Functions !
February 5th 2010, 09:24 AM
Perelman
Functional equation !
Hii !
Can You Help Me For This Exercice :
Find all The Functions $f$ : $\mathbb{R}$$\longrightarrow$$\mathbb{R}$ Such as :
$f((f(x)+y)=f(x^2-y)+4f(x)y$
February 5th 2010, 11:01 AM
Opalg
Quote:
Put $y=-... | 5 | [
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0.0296630859375,
0.009765625,
0.05126953125,
-0.03857421875,
-0.0079345703... | 31,445 | 31445 | |
The Existence and Application of Unbounded Connected Components
Journal of Applied Mathematics
Volume 2014 (2014), Article ID 780486, 7 pages
http://dx.doi.org/10.1155/2014/780486
Research Article
The Existence and Application of Unbounded Connected Components
^1School of Mathematics and Quantitative Economics, Dong... | 5 | [
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0.0189208984375,
-0.08056640625,... | 31,446 | 31446 | |
Math Help
December 16th 2011, 12:13 PM #1
Junior Member
Joined
Apr 2010
Posts
58
Limits
Help me please with 2 questions:
Find limit of
1. $a_{n}=\frac{1}{n-1}+...+\frac{1}{2n}$
2. $\underset{n \to \infty }{\lim} \left [ \frac{1}{n^{2}}+...+\frac{1}{(2n)^{2}} \right ]$
Thanks!
Re: Lim... | 5 | [
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0.0103759765625,
0.0126953125,
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0.0072021484375,
-0.115234... | 31,447 | 31447 | |
Help on a system of equations
November 12th 2012, 04:20 AM
Roman10
Help on a system of equations
Hello to all, I'm having problem solving this simple system:
1) 3X + 4Y = 25
2) X^2 + Y^2 = 25
may someone help me?
Thanks
November 12th 2012, 04:42 AM
Roman10
Re: Help on a system of equations
... | 4 | [
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0.043701171875,
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0.0152587890625,
0.043701171875,
-0.031982421875,... | 31,448 | 31448 | |
prove a certain function is a polynomial
August 24th 2011, 02:56 AM #1
Junior Member
Joined
May 2008
Posts
50
prove a certain function is a polynomial
I have seen the following problem and I didn't manage to solve it, so I will appreciate any help.
Suppose f is an analytic function defined everywher... | 4 | [
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-0.060546875,... | 31,449 | 31449 | |
greatest area inscribed in a circle
find the rectangle of greatest area that can be inscribed in the circle x^2+y^2=36
The diagonal of the rectangle will be the diameter and I believe the shape is a square
We can always set up a coordinate system so that the origin is at the center of the circle and the x-axis is par... | 4 | [
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Help (Parametric Equation)
September 24th 2009, 05:43 PM
multivariablecalc
Help (Parametric Equation)
Ok so my teacher taught us how to do this but now for a question like this. Can someone tell me how to go about this question?
Find the parametric equations for the surface obtained by rotating the curve y=... | 4 | [
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-0.09033203125,
-0.064941406... | 31,451 | 31451 | |
Variation of Parameters
February 10th 2010, 07:07 PM
Aryth
Variation of Parameters
Use variation of parameters to obtain a particular solution of the non-homogeneous problem
$\frac{d^2 y}{dx^2} + p(x)\frac{dy}{dx} + q(x)y(x) = \frac{1}{x}$
With y(1) = 1, y'(1) = -1, x > 0
With the fundamental (mea... | 5 | [
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0.005340576171875,
-0.023... | 31,452 | 31452 | |
Data Compression
Data Compression
3. STATIC DEFINED-WORD SCHEMES
The classic defined-word scheme was developed over 30 years ago in Huffman's well-known paper on minimum-redundancy coding [Huffman 1952]. Huffman's algorithm provided the first solution to the
problem of constructing minimum-redundancy codes. Many... | 5 | [
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-0.0... | 31,453 | 31453 | |
Collinear Points
September 15th 2007, 05:37 AM #1
Newbie
Joined
Sep 2007
Posts
8
Collinear Points
Can someone please help. This problem is confusing and I just can't figure it out.
Definition: Points that lie on the same line are called collinear.
Not sure if you need a minimum of three points i... | 4 | [
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-... | 31,454 | 31454 | |
the encyclopedic entry of present value
Net present value
(
NPV
) or
net present worth
(
NPW
) is defined as the total
present value
(PV) of a
time series
of
cash flows
. It is a standard method for using the
time value of money
to appraise long-term projects. Used for
capital budgeting
, and widely th... | 5 | [
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0.04931640625,
-0.0625,
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0.0595703125,
0.0771484375,
0.107421875,
-0.053955078125,
-0.06005859375,
-0.007781982421875,
0.052734375,
0.0030059814453125,
-0.024169921875,
-0.029541015625,
-0.0419921875... | 31,455 | 31455 | |
Spatial Diversity Scheme to Efficiently Cancel ISI and ICI in OFDM-OQAM Systems
Journal of Computer Systems, Networks, and Communications
Volume 2010 (2010), Article ID 576243, 10 pages
http://dx.doi.org/10.1155/2010/576243
Research Article
Spatial Diversity Scheme to Efficiently Cancel ISI and ICI in OFDM-OQAM Syste... | 4 | [
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0.01239013... | 31,456 | 31456 | |
rectangular to polar equation
April 6th 2009, 04:07 PM #1
Junior Member
Joined
Jul 2008
Posts
49
rectangular to polar equation
convert the rectangular to a polar equation:
-8x-3y+5=0
i know that x= r cos theta, as well as other identities
convert the polar to a rectangular equation:
r=... | 4 | [
-0.03564453125,
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-0.... | 31,457 | 31457 | |
the encyclopedic entry of Rouché's theorem
In
mathematics
, especially
complex analysis
,
Rouché's theorem
tells us that if the
complex
-valued
functions f
and
g
are
holomorphic
inside and on some closed contour
C
, with |
g
(
z
)| < |
f
(
z
)| on
C
, then
f
and
f
+
g
have the same numbe... | 5 | [
-0.034423828125,
0.0020294189453125,
-0.06298828125,
0.0908203125,
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0.03515625,
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-... | 31,458 | 31458 | |
Homework Help
Posted by Kara on Thursday, November 10, 2011 at 10:43pm.
Given the function defined as f(x)=x^3-(3/2)x^2-6x+10
a) Explain why f(x) must have a root between x=-3 and x=-2
b) Write an equation of the line perpendicular to the graph of f at x=0
c) Find the x and y coordinates of the point on the graph o... | 4 | [
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-0.03369140625,
... | 31,459 | 31459 | |
Double integral
February 5th 2009, 04:21 PM #1
Junior Member
Joined
Feb 2008
Posts
63
Double integral
I have no idea how to solve the double integral for the function. Could I get some help please?
$<br /> \int_0^1 \int_0^1 max\{x,y\} * e^{max\{x^2,y^2\}} dx dy <br />$
Last edited by Andreamet;... | 5 | [
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Finding the partial derivative I think
April 6th 2010, 09:41 PM #1
Newbie
Joined
Apr 2010
Posts
6
Finding the partial derivative I think
I think I'm supposed to find the partial derivative of the equation with respect to x and then with respect to y, right?
The Problem is...
Find the slope of t... | 5 | [
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-0.0... | 31,461 | 31461 | |
Calculus Problem
March 18th 2006, 12:11 PM #1
Member
Joined
Jan 2006
Posts
118
Calculus Problem
83. What is the area of the region in the first quadrant enclosed by the graphs of y = cosx, y = x,and the y-axis?
(A) 0.127
(B) 0.385
(C) 0.400
(D) 0.600
(E) 0.947
frozenflames
... | 5 | [
-0.0458984375,
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-0.00442... | 31,462 | 31462 | |
SOHCAHTOA Trigonometry
Besides the unit circle method, there is another method for defining (and working with) the basic trigonometric functions. For this method to work, however, the triangle in question must be a right
triangle. There is a mneumonic (a memory aid) to help you remember the trig functions: SOHCAHTOA (p... | 4 | [
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[SOLVED] Algebraic Topology: Fundamental group of Klein bottle
April 25th 2010, 02:05 PM
JJMC89
[SOLVED] Algebraic Topology: Fundamental group of Klein bottle
Prove that the fundamental group of a Klein bottle is $G = \{ a^{m}b^{2n+\epsilon} \ ;\ m \in \mathbb{Z}, \ n \in \mathbb{Z} \ \epsilon = 0 \ or\ 1, \ ba=... | 5 | [
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-0.00... | 31,464 | 31464 | |
Divisibility
September 22nd 2006, 10:57 AM
JaysFan31
Divisibility
Had the following question:
If r is in Z and r is a non-zero solution of x^2+ax+b=0 (where a,b are in Z) prove that r divides b.
I solved it the following way:
Letting c and r be the roots of the polynomial.
(x-c)(x-r)=0
x^2+... | 4 | [
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... | 31,465 | 31465 | |
Calculate Your Sales Prices Using Net Profit per Hour, Part 2
Originally published: 06.01.06 by Ruth King
Whether you calculate your prices on a gross marginbasis or net profit per hour basis, you must have accuratelabor costs.
Both require that you estimate thenumber of hours to complete the job. If you miss thehou... | 4 | [
0.024658203125,
0.0751953125,
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0.060546875,
-0.01... | 31,466 | 31466 | |
Math Help
November 1st 2009, 01:39 AM #1
Super Member
Joined
Aug 2009
Posts
639
trigo
given that summation:
∑ z^k= (1-z^(n+1))/ (1- z) for k= 0,1,2,3......n
choose z= e^(ix),
solve ∑ sin (kx) from k=0,1,2,...n..
to solve this, i expressed
sin (kx)= 1/2( e^((ikx) - e^(-ikx))
th... | 4 | [
-0.09814453125,
0.12890625,
0.00811767578125,
0.04150390625,
-0.037841796875,
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0.00958251953125,
0.0085... | 31,467 | 31467 | |
[Intergal]Change of Variables
Evaluate $\iint_D {(x+2y)exp(y-x) dxdy}$ where D={y<x<2-2y, 0<y< 2/3} by letting u=x+2y v=y-x
Last edited by chialin4; February 4th 2010 at 05:27 PM.
The new region of integration is a triangle bound by $-u \le v \le 0,$$0 \le u \le 2$. The Jacobian of the transformation is $<br /> \frac... | 5 | [
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-0.0240478515625,
-0.0242919921... | 31,468 | 31468 | |
Need help on some Trig
April 2nd 2009, 01:04 PM #1
Junior Member
Joined
Feb 2009
Posts
30
Need help on some Trig
Having trouble with these problems can anyone help with any of these questions? And if possible can you explain> been working on this assignment all day and these are the only ones left.
... | 4 | [
-0.09228515625,
0.05029296875,
0.0225830078125,
-0.0179443359375,
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0.060791015625,
0.031982421875,
-0.0223388671875,
0.0220947265625,
0.0654296875,
-0.04931640625,
0.0198974609375,
-0.005035400390625,
0.08056640625,
-0.06689453125,
-0.047607421875,... | 31,469 | 31469 | |
Convergence Analysis of the Relaxed Proximal Point Algorithm
Abstract and Applied Analysis
Volume 2013 (2013), Article ID 912846, 6 pages
http://dx.doi.org/10.1155/2013/912846
Research Article
Convergence Analysis of the Relaxed Proximal Point Algorithm
^1School of Economics and Management, Southeast University, Nan... | 4 | [
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0.0004367828369140625,
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0.0120849609375,
0.019287109375,
0.0... | 31,470 | 31470 | |
Field strength
In physics the '''field strength''' of a vector field|field is its Force (physics)|force per unit mass or charge at a point
Gravitational field strength
The
gravitational field field strength E[G]
at a point is the
force
per unit
mass
acting on a body arising from another object's
mass
When a
... | 4 | [
0.00762939453125,
0.024658203125,
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0.10009765625,
... | 31,471 | 31471 | |
line integrals
August 6th 2008, 04:11 PM #1
Junior Member
Joined
Aug 2008
From
Chicago, IL
Posts
73
ok...Compute the line integral bounded by C of ydx - xdy (i dont know if that was a typo if thats normal, ive never seen an integral like that)
where C is the upper semicircle of radius 1 oriented f... | 5 | [
-0.08837890625,
-0.0084228515625,
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0.0235595703125,
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-0.025146484375,
-0.008544921875,
-0.0537... | 31,472 | 31472 | |
Questions Involving Dividing Polynomials
October 10th 2012, 12:29 PM #1
Junior Member
Joined
Sep 2012
From
canada
Posts
27
Questions Involving Dividing Polynomials
1) 8x^3 + 10x^2 - px - 5 is divisible by 2x+1. There is no remainder. Find the value of p.
2) When x^6 + x^4 - 2x^2 + k is divided b... | 4 | [
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-0.07470703125,
-0.076171875,
-0.02734375,
-0.034423828125,
-0.0... | 31,473 | 31473 | |
the encyclopedic entry of bouguer correction
Earth's gravity, denoted by g, refers to the gravitational attraction that the Earth exerts on objects on or near its surface. Its strength is usually quoted in terms of the acceleration it gives to
falling bodies (acceleration due to gravity), which in SI units is measured ... | 4 | [
-0.0113525390625,
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0.09814453125,
0... | 31,474 | 31474 | |
Splitting Matching Pursuit Method for Reconstructing Sparse Signal in Compressed Sensing
Journal of Applied Mathematics
Volume 2013 (2013), Article ID 804640, 8 pages
http://dx.doi.org/10.1155/2013/804640
Research Article
Splitting Matching Pursuit Method for Reconstructing Sparse Signal in Compressed Sensing
^1The ... | 4 | [
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-0.005157470703125... | 31,475 | 31475 | |
Elements of the algebra of differential forms
Bases: sage.structure.element.AlgebraElement
Differential form class.
EXAMPLES:
In order to instantiate differential forms of various degree, we begin by specifying the CoordinatePatch on which they live, as well as their parent DifferentialForms algebra.... | 5 | [
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... | 31,476 | 31476 | |
Homework Help
Posted by Tyler on Thursday, June 20, 2013 at 9:17pm.
Find the linear approximation L(x) of
ln(x)at the point a = 12.
• Calculus - bobpursley, Friday, June 21, 2013 at 5:39am
L(x)=ln(z)+delta(x-z)*dL/dx
L(x)=ln(12)+1/12*(x-12)
so for example, what is Ln(13):
Ans: Ln(13)=ln(12)+1/12*... | 5 | [
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0.0016021728515625,
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-0.10205078125,
0.... | 31,477 | 31477 | |
Geometric series question (proof) C2
March 3rd 2013, 07:47 AM
Tuzina
Geometric series question (proof) C2
Hi everyone,
I have a question from GeometricSeries(c2) and I'm stuck on (c)(i).
The nth term of a geometric sequence is Un, where Un=3x4^n
(a) Find the value of U1 and show that u2=48
(b) Wr... | 4 | [
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0.023193359375,
-0.1103515625,
-0... | 31,478 | 31478 | |
Homework Help
Posted by andy on Thursday, July 25, 2013 at 2:11pm.
Evaluate ∬R 1/sqrt(x^2+y^2) dx dy, where R is the region bounded by y≥0 and x^2−x+y^2≤0.
• calculus - Steve, Thursday, July 25, 2013 at 2:53pm
The region is the upper half of a circle with radius 1/2 centered at (1/2,0):
(x-1/2)^2 + y^2 = ... | 5 | [
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-0.03857421875,... | 31,479 | 31479 | |
arithmetic seq. !
July 14th 2006, 01:04 PM
bobby77
please help !
Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the arithmetic sequence?
Which one of the basic functions (linear, quadratic, rational, or exponential) is related to the geometric sequence?
Give ... | 4 | [
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Dynamical systems: Mapping chaos with R
July 13, 2012
By Corey Chivers
Chaos. Hectic, seemingly unpredictable, complex dynamics. In a word: fun. I usually stick to the warm and fuzzy world of stochasticity and probability distributions, but this post will be (almost)
entirely devoid of randomness. While chaotic dyna... | 4 | [
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-0.044677734375,
-0.095... | 31,481 | 31481 | |
Math Help
January 8th 2007, 10:16 AM #1
Newbie
Joined
Nov 2006
Posts
9
question
In a right angled triangle ABC Sin A = 5/13
calculate without finding the angel A the following
a) Cos A
b) Tan A
That means the opposite side is 5 and hypotenuse is 13 because sine is opposite over hypot... | 4 | [
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Homework Help
Posted by Felicia on Monday, October 1, 2012 at 7:16pm.
Consider the planes given by the equations
2y−2x−z=2
x−2y+3z=7
(a) Find a vector v parallel to the line of intersection of the planes.
(b)Find the equation of a plane through the origin which is perpendicular to the line of intersection of these... | 4 | [
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Optimization Problem with Triangles
May 8th 2011, 07:14 PM
RezMan
Optimization Problem with Triangles
hey guys can you help me here.
A right triangle has area 50.
a) Express the hypotenuse as a function of a single variable, and
b) Find the shortest possible hypotenuse this triangle can have
I ... | 5 | [
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Converting polar equation to rectangular
December 30th 2010, 09:59 AM
chrisdb
Converting polar equation to rectangular
I know that I usually use r^2=x^2+y^2, x = r cos(t) and y = r sin(t) to convert polar equations to rectangular, but I seem to come to the correct solution.
$r(\theta) = \frac{e \cdot p}{1+e... | 4 | [
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Rotations in the Space of Split Octonions
Advances in Mathematical Physics
Volume 2009 (2009), Article ID 483079, 11 pages
http://dx.doi.org/10.1155/2009/483079
Research Article
Rotations in the Space of Split Octonions
^1Particle Physics Department, Andronikashvili Institute of Physics, 6 Tamarashvili Street, 0177 ... | 4 | [
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Does Adding Insulation Make Sense?
Does Adding Insulation Make Sense?
Key Points
• An insulation upgrade can save on long-term energy costs, but requires a large upfront investment.
• Payback is an excellent tool for predicting the potential return on investment.
• Payback calculations include installation and... | 5 | [
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This is tricky..Linear algebra again
April 20th 2008, 02:48 AM #1
Newbie
Joined
Apr 2008
Posts
11
This is tricky..Linear algebra again
Let A be an n x n matrix with the property that the intersection of its column space and its null space is the 0 vector. That is: nullA(intersection)colA={0}. Show that A... | 4 | [
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proof of integral
May 2nd 2007, 09:51 PM
Recklessid
proof of integral
Hi, can someone help me with this:
If m and n are positive integers, show that
int_{0}^{1} (x^m)(1-x)^n dx (Thats the integral from 0 to 1)
is equal to
int_{0}^{1} (x^n)(1-x)^m dx.
Thanks a bunch.
May 2nd 2007, 10:16 ... | 5 | [
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Topological solitons
Topological solitons in the Heisenberg ferromagnetic
The n-field theory
In the Heisenberg model spin is a 3D vector n = (n[1], n[2], n[3]) with unit length n^2 = 1 . We consider n(x,y) field on 2D plane. In continuum limit the system energy
E = 1/2 ∫ dx dy (n[x]· n[x] + n[y]· n[y] ) , n[x]= ∂n/∂... | 4 | [
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-0.... | 31,490 | 31490 | |
Strong connectivity
ICS 161: Design and Analysis of Algorithms
Lecture notes for February 20, 1996
Strongly connected components
Strong connectivity and equivalence relations
In undirected graphs, two vertices are connected if they have a path connecting them. How should we define connected in a directed graph?
... | 4 | [
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The Wave Equation
As was discussed in Lesson 1, a wave is produced when a vibrating source periodically disturbs the first particle of a medium. This creates a wave pattern that begins to travel along the medium from
particle to particle. The frequency at which each individual particle vibrates is equal to the frequenc... | 4 | [
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Composite Functions
November 17th 2007, 09:08 PM #1
Member
Joined
Oct 2007
Posts
134
Composite Functions
f(x) = $\sqrt {3x}$
g(x) = 1+x+x^2
Pleack check and correct the following composite functions
1) f(g(x)) = $\sqrt {3+3x+3x^2}$ Domain: all real numbers. Is this correct?
2) g(f(x)) =... | 4 | [
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Simultaneous Linear Equation Solver
Solving Simultaneous Linear Equations
See also: matrix, Gauss-Jordan elimination, Geometric Linear Transformation
The calculator below will solve simultaneous linear equations with two, three and up to 10 variables if the system of equation has a unique solution.
For systems of equ... | 5 | [
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SIR Model – The Flue Season – Dynamic Programming
May 14, 2013
By Francis Smart
# The SIR Model (susceptible, infected, and recovered) model is a common and useful tool in epidemiological modelling.
# In this post and in future posts I hope to explore how this basic model can be enriched by including different po... | 4 | [
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Get the set of every direction of S
October 21st 2011, 08:13 AM #1
Newbie
Joined
Mar 2011
Posts
22
Get the set of every direction of S
Well, d is a direction of a set S if for all $x \in{S}, \lambda \geq{0}, x+\lambda d \in{S}$.
Let $S=\left\{{(x_1,x_2): x_1-2x_2 \geq{-6}, x_1-x_2\geq{-2}, x_1\geq{0}... | 5 | [
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urgent HW help
December 29th 2008, 02:19 AM #1
Newbie
Joined
Oct 2008
Posts
17
urgent HW help
Q.1 Use Newton’s method to find the value of x for the function
f(x)=2x^2+4x-3=0 ; x>0
Note: Perform only 3 iterations.
Q2 and Q3 in attachment
thanks in advance
Various problems
Hello
... | 4 | [
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Physics Forums - Moment of inertia tensor
AriAstronomer Mar14-12 10:01 AM
Moment of inertia tensor
1 Attachment(s)
1. The problem statement, all variables and given/known data
Find the moment of inertia tensor of the plate attached below
2. Relevant equations
σ = area density
3. The attempt at a solution
So... | 4 | [
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Sketch the graph of a continuous function
December 12th 2009, 08:00 AM
ughintegrals
Sketch the graph of a continuous function
Hi again I'm tackling a question that is very likely to be on a future exam, and I'm a bit stuck.
The question:
g(x){ 0 if x<2
2 if 2<x<4
-1 if x>4
Sketch the graph... | 4 | [
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