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Kinematics/Algebra Review
From Wikibooks, open books for an open world
Algebra Review[edit]
- Variables, Equations, Polynomials and Systems
A variable is a mathematical term represented by letters that can have varying values. If independent, the variable depends on no other variable(s). If dependent, the variable ... | 4 | [
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Prove that
July 6th 2009, 08:24 AM #1
If Tn = sin^nA+cos^nA
Prove that
T3-T5 = T5-T7
...T1.......T3
plzzzz explain by covering all the steps as i belong to 10th standard ......
= $\frac{T_5-T_7}{T_3-T_5}$
$\frac{sin^5A+cos^5A-sin^7A-cos^7A}{sin^3A+cos^3A-sin^5A-cos^5A}$
= $\frac{s... | 4 | [
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Homework Help
Posted by Jaclyn on Friday, September 7, 2007 at 2:06am.
You jump from the end of a diving board that is 3 meters above the water. You spring upward from the end of the board with an initial velocity of 5 m/s. How long are you in the air? What is the speed
as you hit the water? I need to know the steps i... | 4 | [
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Solutions for linear equations
October 11th 2009, 10:34 AM
Frostking
Solutions for linear equations
I am trying to understand how to determine the difference between no solutions for a system and infinitely many solutions.
I have the set of equations:
x + 2y - z = 1
2x + y + z = 1
x - y + 2z = ... | 4 | [
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Common Core Standards : CCSS.Math.Content.8.G.B.6
Common Core Standards: Math
Math.CCSS.Math.Content.8.G.B.6
6. Explain a proof of the Pythagorean Theorem and its converse.
We're about to start working with the Pythagorean Theorem, which most students are somewhat familiar with, probably. (Remember it? It says, basi... | 4 | [
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Homework Help
Posted by christine on Monday, August 15, 2011 at 1:43pm.
2. Simplify. Please be sure to show all of your work.
-3(-9) – |-5 – 3
3. Simplify. Please show all of your work
9c^3+7c-(3c^3-12+c)
4. Solve 4x- 3(5x-8) =23-9(x+2) . Please show all of your work
5. Solve the following equation for z. Please ... | 4 | [
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0.0070190429687... | 2,305 | 2305 | |
Estimating means and medians from histograms
Some of this will be hard to read, because it is written in TeX, but most should be readable. HTML commands will need to be removed before it can be processed as LaTeX.
\documentstyle{book} \begin{document} \section{Alternative definition of the mean}
It is useful to prese... | 5 | [
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How much has price and quantity increased from year 1 to year 2?
August 1st 2011, 08:26 AM #1
Newbie
Joined
Aug 2011
Posts
2
How much has price and quantity increased from year 1 to year 2?
We sell two products.
Product A:
---------------------------
price y1 = 10
quantity y1 = 2
sal... | 4 | [
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further maths roots of equations
September 29th 2008, 09:07 AM #1
Member
Joined
Sep 2008
Posts
239
further maths roots of equations
Hi can any body solve this question?
The equation 2x²-4x-3=0 has roots a and b. Find the quadratic equation with integer coefficients and with roots a³ , b³
Hello,... | 4 | [
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Applications of eigenvectors word problem
A radioactive isotope A decays at the rate of 2% per century into a second radioactive isotope B, which in turn decays at a rate of 1% per century into a stable isotope C.
a) Find a system of linear differential equations to describe the decay process. If we start with... | 5 | [
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evaluating inverse trig functions
October 16th 2012, 12:40 PM
kingsolomonsgrave
evaluating inverse trig functions
evaluate cos(2 tan^-1(1/3))
I figure if I can evaluate arctan of 1/3 I can solve it (multiply by two and take the cosine of the result).
Is it advisable to do this with a calculator or is t... | 4 | [
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Slant Asymptote
June 20th 2008, 01:59 PM #1
Newbie
Joined
Jun 2008
Posts
12
Slant Asymptote
What is the equation of the slant asymptote for R(x) = x^2 - x + 17 divided by x^2 + 1?
No wonder you are having problems; this doesn't have a slant asymptote. It has a horizontal asymptote.
$\frac{x^2 -... | 4 | [
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Homework Help
Posted by Annika Rae on Sunday, January 5, 2014 at 12:18am.
1) What is the value of y in the system x+3y-z=-3, 6x=2y-1 and x=z+3 IF x = 5/6 and z = 23/6?
2) Given the systems x+y+z=-14 and 2x+y+6z=16, how many number of solutions to the system are there?
• Math - Reiny, Sunday, January 5, 2014 at 10:... | 4 | [
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Help with integration
April 9th 2008, 08:24 AM
nisse pisse
Help with integration
I supposed to integrate (x^2 + x)^(1/2).
I do it this way
int (x^2 + x)^(1/2) = x(x^2 + x)^(1/2) - 1/2* int (x(2x + 1))/(x^2 + x)^(1/2) = x (x^2 + x)^(1/2) - 1/2((xln(x^2 +x)) - ln(x^2 + x))
IF u now take 2pi ((x = 1) ... | 5 | [
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algebra word problem: still stuck
Posted by john on Tuesday, February 17, 2009 at 5:25pm.
question:
rachel allows herself 1 hour to reach a sales appt 50 miles away. after she has driven 30 miles, she realizes that she must increase her speed by 15mph in order to get there on time. what was her
speed for the first 30... | 4 | [
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Homework Help
Posted by Andy G on Monday, March 17, 2014 at 8:53pm.
The population of the US in 1850 was 23191876. In 1900, the population was 62947714.
a. assuming that the population grew exponentially, compute the grownth constant.
b. assuming continued growth at a constant rate, predict the population in 1950.
... | 4 | [
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Im not sure if i understand this problem :(
September 10th 2008, 12:57 PM #1
Junior Member
Joined
Sep 2008
Posts
43
Im not sure if i understand this problem :(
Let f(x)=8x^2. Find a value A such that the average rate of change of f(x) from 1 to A equals 96.
someone help me please
Hello.
Th... | 4 | [
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Homework Help
Posted by Joshie on Wednesday, October 6, 2010 at 5:09pm.
gas is pumped into a spherical balloon at the rate of 1 cubic feet per minute. How fast is the diameter of the balloon increasing when the balloo0n contains 36 cubic feet of gas?
• calculus - Reiny, Wednesday, October 6, 2010 at 5:27pm
V =... | 5 | [
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Question on First order differential equation
March 24th 2009, 08:40 AM
bmcciyem
Question on First order differential equation
Hi i have a question i think it is to do with first order differential equations.
The heat loss from a hot water tank is proportional to the temperature at any particular time. Twen... | 5 | [
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Trigonometric Integrals
February 16th 2008, 12:33 PM #1
Newbie
Joined
Feb 2008
Posts
21
Trigonometric Integrals
Can anyone help me or give me a good idea of how to approach the definite integral ([sinx]^2)*([cosx]^2) with the limits of integration from 0 to pi/2? I'm pretty sure I should somehow be able ... | 4 | [
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Equation of curve of intersection (R3)
March 5th 2011, 10:57 AM #1
Member
Joined
Apr 2010
Posts
156
Equation of curve of intersection (R3)
What is the equation of the curve of intersection of:
$z = x^2 + y^2$ and
$2y + z = 0$
(Refer to attachment for graph of both equations).
Please i... | 4 | [
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0.0... | 2,320 | 2320 | |
Business Math problem help
December 12th 2006, 08:45 AM #1
Newbie
Joined
Nov 2006
Posts
2
Business Math problem help
I've worked on this problem for a couple of hours and I think my problem is that I don't know where to start....
Georgia Cabinets manufactures kitchen cabinets that are sold to local ... | 4 | [
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Homework Help
Posted by Chloe on Friday, October 8, 2010 at 8:47pm.
I've been trying to work this problem out for the past week and still havent managed to get to the answer.
jeans unlimited sold 6000 pairs of jeans in october at an average of 44$ each. The company president decides that she must increase the company... | 4 | [
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Homework Help
Posted by Andrew on Monday, July 18, 2011 at 1:42pm.
an open box is made by cutting out squares from the corners of a rectangular piece of cardboard and then turning up the sides. If the piece of cardboard is 12 cm by 24 cm, what are the dimensions of
the box that has the largest volume made in this way?... | 4 | [
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Teaching synergistic integration of economics and mathematics.
Link/Page Citation
INTRODUCTION
A job worth doing is a job worth doing well. Most concepts in economics are primarily ... | 5 | [
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Curiosity about surface are
October 4th 2011, 01:03 AM
agentmulder
Curiosity about surface are
The volume of a sphere is
V = 4/3(pi)r^3
If you differentiate with respect to r you get
dV/dr = 4(pi)r^2
This is the surface area of the sphere.
How come this works so well for the sphere? It d... | 5 | [
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Taylor Polynomial e^x * cos(x)
August 24th 2012, 12:41 PM #1
Junior Member
Joined
Jul 2011
Posts
28
Taylor Polynomial e^x * cos(x)
Question: Find the Taylor Polynomial $P_2 (x)$ for $e^x cos(x)$ about $x_0 = 0$.
Here's what I did:
$P_2 (x) = e^x cos(x) + (e^x cos(x) - e^x sin(x)) (x) - \frac{2e... | 5 | [
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Homework Help
Posted by Anon on Friday, May 24, 2013 at 5:49am.
Create a 3rd degree polynomial with real coefficients that has roots -1 and 4i. Write your answer in form ax^3 + bx^2 + cx+ .
• Math - Reiny, Friday, May 24, 2013 at 8:05am
any complex roots come in conjugate pairs
so if 4i is a root, so is -4... | 4 | [
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0.0673828125,
0.00927734375,
0.035888671875,
-0.059326171875,
0.010986328125,
... | 2,327 | 2327 | |
Solving differential equation
March 25th 2009, 01:34 AM #1
Member
Joined
Jun 2008
Posts
175
Trying to solve this differential equation by separating variables. Where c is a constant and K is the carrying capacity. P is population
$\frac{{dP}}{{dt}} = c\ln \left( {\frac{K}{P}} \right)P$
I started... | 5 | [
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0.07177734375,
0.0159912109375,
-0.0019683837890625,
-0.0834960... | 2,328 | 2328 | |
Logarithm Question
2013-Feb-19, 12:53 AM #1
Established Member
Join Date
Dec 2001
Posts
201
Logarithm Question
I’ve got a math question concerning logarithms.
I’m trying to translate a working VBA program into a VBAish program language that is used in a Programmable Logic Controller (PLC) to calcula... | 5 | [
0.007659912109375,
0.037109375,
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0.03662109375,
... | 2,329 | 2329 | |
M-5 TORSION PENDULUM AND LATHE
1. PURPOSE:
(1) To determine the rigidity modulus of steel and brass.
(2) To measure the moment of inertia of several bodies.
2. APPARATUS:
Torsion lathe.
Torsion pendulum, with accessories.
3. THEO... | 4 | [
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... | 2,330 | 2330 | |
[SOLVED] I have a problem.....
June 29th 2007, 03:06 AM #1
spank
Guest
It's a fairly straight forward one i think, but its been a long time since a studied maths!
The problem is...
There are 6 slots in a row.
One tab can be inserted into each slot.
There are 6 different coded tabs (e.g. 1, 2, 3... | 4 | [
0.048095703125,
-0.0419921875,
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0.00970458984375,
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for
======== START LECTURE #16 ========
The control for the datapath
We start with our last figure, which shows the data path and then add the missing mux and show how the instruction is broken down.
We need to set the muxes.
We nee... | 4 | [
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0.026611328125,
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0.07666015625,
-0.07275390625,
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0.09765625,
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-0.030761... | 2,332 | 2332 | |
Re: st: Homogeneity of ordinal Variabel
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st... | 5 | [
0.052490234375,
-0.0361328125,
0.00482177734375,
0.0234375,
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-0.024414... | 2,333 | 2333 | |
Conservation of energy
May 7th 2008, 10:56 AM
j-lee00
Conservation of energy
Conservation of energy
show that when Mass (m1) and kinetic energy (Q1) collide with a stationary particle (m2) it transfers an energy. Using conservation of energy and momentum
Q2 = (4M1M2)/(M1 + M2)^2 x Q1
Cheers
May 7... | 5 | [
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0.1123046875,
0.0349121... | 2,334 | 2334 | |
a few questions I need help with. thank you
August 17th 2007, 03:45 AM #1
Newbie
Joined
Aug 2007
From
Virginia
Posts
4
a few questions I need help with. thank you
Okay I am almost done with this lesson. Once again I need help. UGH.. I already did this but received an F and I am fixing all the wrong a... | 4 | [
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0.0225830078125,
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The Dow Jones Industrial Average: A Fata Morgana
Washington’s Blog
by Wim Grommen
Guest post by Wim Grommen. Mr. Grommen was a teacher in mathematics and physics for eight years at secondary schools. The last twenty years he trained programmers in Oracle-software. He worked almost
five years as trainer for Oracle and ... | 4 | [
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... | 2,336 | 2336 | |
Calculus AB: Applications of the Derivative
The general procedure for curve sketching is based on the material learned in the last few sections. Essentially, the first and second derivatives are used to determine which of the following pieces
will be used where to form the graph:
Figure %: The Four Easy Pieces
Then, ... | 4 | [
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-... | 2,337 | 2337 | |
e P
9B-1 : The Ideal Rankine Power Cycle 12 pts
Water is the working fluid in a Rankine Cycle. Superheated vapor enters the turbine at 480°C. The net power output of the cycle is 100 M... | 5 | [
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-... | 2,338 | 2338 | |
Submit Your Own GMAT Math Questions - Get GMAT Club Tests
Author Message
TAGS:
Re: Submit Your Own GMAT Math Questions - Get GMAT Club Tests [#permalink] 03 May 2013... | 4 | [
-0.123046875,
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polar forms
September 10th 2007, 10:25 AM #1
Member
Joined
Aug 2007
Posts
96
polar forms
how can i express (1+i)/(sqrt(3)+i) in the x+iy form? Also, using those two smaller expressions, i must show that cos(pi/12) = (sqrt(3)+1)/(2sqrt(2)) and sin(pi/12) = (sqrt(3)-1)/(2sqrt(2))
another one, i must s... | 5 | [
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-0.05126953125,
-... | 2,340 | 2340 | |
Integral containing something over the root of x²-a²
June 30th 2010, 02:10 PM #1
Member
Joined
May 2010
Posts
241
Integral containing something over the root of x²-a²
Hi there, I'm facing this problem which I couldn't solve.
The statement says:
Evaluate the next integrals, expressing it previous... | 5 | [
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0.0137939453125,
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0.0179443359375,
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0.057861328125,
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-0.00518798828125,... | 2,341 | 2341 | |
quick differentiating question
how would I partially differentiate 1-x/(x^2+y^2) with respect to y and -y/(x^2+y^2) with respect to x.
Hello, $1-\frac{x}{x^2+y^2}$ x is treated as a constant since you differentiate with respect to y. So $\frac{\partial}{\partial y} \left(1-\frac{x}{x^2+y^2}\right)=-x \cdot \frac{\part... | 5 | [
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0.01806640625,
0.02783203125,... | 2,342 | 2342 | |
Different questions about Equations
November 15th 2006, 05:46 AM
Fnus
Different questions about Equations
Hi, this might be really simple, but I just don't get it, so I'd like some help ^^
Question 1:
'Part of a garden consist of a square lawn with a path 1.5 metres wide around its perimeter. If the law... | 4 | [
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-0.... | 2,343 | 2343 | |
counting numbers...
November 14th 2011, 10:31 AM
slapmaxwell1
counting numbers...
ok so here goes....
the digits 3, 6, 7 and 8 will be used without repetition to form different 3 digit numbers. of all such numbers how many are greater then 500?
A. 6
B. 12
C. 18
D. 24
E. 48
i just ... | 4 | [
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0.003753662109375,
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0.125,
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... | 2,344 | 2344 | |
ria
Solutions of Univariate Polynomials
Continuation
Next we examine a polynomial of degree 3:
poly: x^3 + x^2 - 8*x - 12;
The computation of the zeroes is straightforward:
sol: solve (poly=0, x);
[x = 3, x = - 2]
The answer is again written as a list of two equations. We know that for an equation of third d... | 4 | [
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... | 2,345 | 2345 | |
Equivalence Relations Proof
November 10th 2009, 09:00 AM
nataliemarie
Equivalence Relations Proof
For homework I am supposed to prove a proposition that says: Assume we are given an equivalence relation on set A.
For a1 and a2 in A either [a1] = [a2] or [a1] intersect [a2] = the empty set.
where [a1] mea... | 5 | [
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0.06005859375,
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0.058837890625,
0.1083984375,
0.056396... | 2,346 | 2346 | |
Math Help
November 23rd 2009, 02:38 AM #1
Summation
My textbook states.
$-2\sum_{i=k-4}^{2}i=-(7-k)(k-2)$
But I got the summation to equal -2k+4. I don't see how the textbook got the LHS to equal to the RHS. Thanks in advance.
Last edited by Simplicity; November 23rd 2009 at 02:58 AM.
$S_n=\f... | 4 | [
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-0.03564... | 2,347 | 2347 | |
Evaluating this integral
February 9th 2009, 06:02 PM #1
Junior Member
Joined
Jan 2009
Posts
74
Evaluating this integral
The integral of 1/(x-3)(x+2)
The answer is 1/5 ln |x-2/x| + C
I split it up to be A/(x-3) + B/(x+2) = (Ax+2A+Bx-3B)/(x-3)(x+2) = (x(A+B)+2A-3B)/(x-3)(x+2). Then I set A+B = 0 s... | 5 | [
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... | 2,348 | 2348 | |
calculus 2/integrals
August 28th 2007, 10:17 AM #1
Member
Joined
Aug 2007
Posts
148
calculus 2/integrals
Hi everyone,
Can you please tell me if this is correct and if it isn't can you give me a hint or explain to me why it is wrong?
Evaluate the following integrals:
X/(X^2+1)^2dx
u=x^... | 5 | [
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0.0751953125,
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-0.004974365234375,
0.01953125,
0.04296875,
-0... | 2,349 | 2349 | |
Vector Field Problem
June 17th 2010, 03:48 PM #1
Newbie
Joined
Jun 2010
Posts
2
Vector Field Problem
This is a word problem that was given to my group as a project and the problem itself is rather lengthy so I will give the portions that are relevant to the problem.
The set up to the problem is that... | 4 | [
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0.0322265625,
-0.131835... | 2,350 | 2350 | |
Differentiable
April 22nd 2007, 12:10 PM #1
Newbie
Joined
Mar 2007
Posts
21
Differentiable
Determine if each function is differentiable at x=1. If it is find the dirivative, if not explain y not.
a) f(x) = { 3x-2 if x<1 and x^3 if x >=1
b) f(x) = { 2x+1 if x<1 and x^2 if x>=1
We are differ... | 4 | [
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0.03369140625,
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-0.007537841796875,
-0.0096435546875,
-0.... | 2,351 | 2351 | |
Absolute Value Equations
December 21st 2008, 11:55 AM #1
MHF Contributor
Joined
Jul 2008
From
NYC
Posts
1,489
Absolute Value Equations
It's final exam week. Our teacher is reviewing the material given in class this long semester. However, there are questions that he did not have time to go over but t... | 4 | [
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-0.0756835... | 2,352 | 2352 | |
Limit of ln(cosx)/x^2
Can any help me with this. I need to solve this without L'Hopital's rule. $\lim$$($$\ln$$($$\cos$$($$x$$)$$)$$/$$x^2$$)$ when x->0 Thanks in advance
We start from the 'infinite product'... $\cos x= \prod_{n=0}^{\infty} (1-\frac{ 4 x^{2}}{\pi^{2} (2n+1)^{2}})$ (1) ... and from (1) we obtain... $\l... | 5 | [
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-0.060791015625,
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0.00106048583984375,
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-0.044677734375,
0.02001953125,
... | 2,353 | 2353 | |
probability help..poisson process
March 24th 2011, 06:47 AM #1
Newbie
Joined
Mar 2011
Posts
2
probability help..poisson process
During normal working hours, the help desk of a car repair company(also repairs small amount of motorbikes) receives telephone calls according to a Poisson process at the ra... | 5 | [
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0.04736328125,
-0.093261718... | 2,354 | 2354 | |
Is this an equivalent definition for injection?
October 1st 2012, 11:32 AM #1
Junior Member
Joined
Jul 2010
From
NJ
Posts
68
Is this an equivalent definition for injection?
I recently had problem set which asked to prove that if for any $A, B \subset X$, we have
$f(A \cap B) = f(A) \cap f(B)$ the... | 5 | [
0.022705078125,
0.011474609375,
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0.0849609375,
0.01544189453125,
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0.08642578125,
-0.0029754638671875,
0.08447265625,
0.03466796875,
0.0140380859375,
-0.095... | 2,355 | 2355 | |
Arithmetic series - stuck!
May 22nd 2012, 11:42 AM #1
Newbie
Joined
May 2012
From
London
Posts
7
Arithmetic series - stuck!
Hi all, just joined and introduced myself in the lobby.
I have two questions which I have not been able to do the workings out for. I understand the formula to calculate ar... | 4 | [
-0.056884765625,
-0.0306396484375,
0.04541015625,
-0.09912109375,
-0.04443359375,
0.07177734375,
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0.060302734375,
-0.037841796875,
0.061279296875,
-0.0164794921875,
0.0133056640625,
0.01611328125,
-0.036865234375,
-0.0986328125,
-0.025390625,
-0.00186920166015625,
... | 2,356 | 2356 | |
Which representative of the antiderivative class is used for the area?
August 20th 2011, 10:41 PM #1
Member
Joined
Aug 2010
Posts
130
Which representative of the antiderivative class is used for the area?
In rigorously defining the antiderivative as an operator from a function to a class of functions (he... | 4 | [
-0.053955078125,
0.00445556640625,
-0.005218505859375,
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-0.0859375,
0.0129394... | 2,357 | 2357 | |
Complex no: Where did I go wrong
November 16th 2012, 10:57 PM
Tutu
Complex no: Where did I go wrong
Another one! I'm really sorry. This time I'm not sure where I went wrong.
Express in polar form, (1/(sqrt(21) - sqrt(7)i)*)
Conjugate, so I got (1/(sqrt(21) + sqrt(7)i))
Let z = sqrt(21) + sqrt(7)i
... | 5 | [
-0.043212890625,
0.003326416015625,
0.013916015625,
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Solids of Revolution
February 13th 2009, 08:11 AM
omgeezy
Solids of Revolution
Really need help, need to check my answers. These are parts of a review so..
#1 Region M is bounded by the x-axis, x=4 and the graph of $LN(x)$
is the interval 1 to 4?
a) find the volume of the solid created by revolvin... | 5 | [
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0.0115966796875,
0.03955078125,
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0.0299072265625,
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-0.000530242919921875... | 2,359 | 2359 | |
5.2.6. Planarly embedded graphs, maps, and faces
Learning objectives
Planar graphs and planar embeddings
Bidirected graphs and maps
Face cycles and faces
Order preserving embeddings and planar maps
The functions Is_Plane_Map() and PLANAR()
Graphs serve for recording relationships between objects. To store graphs in a... | 4 | [
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Algebra by Amiszatu
Aminata Kamara
Week II Assignment
22 November 2012
This week assignment required to solve problem 68 on page 539 of Elementary and Intermediate Algebra. There are three part to this assignment and the first part is as follows; The accompanying graph
shows all of the possibilities for the number of r... | 4 | [
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0... | 2,361 | 2361 | |
A set of n positive numbers. Find the largest possible value of n.
May 16th 2012, 12:35 PM
wannabebrainiac
A set of n positive numbers. Find the largest possible value of n.
Sorry I'm new to the forums and I'm not sure if this belongs here but some help on this one would be greatly appreciated. Thanks in advance... | 4 | [
-0.0257568359375,
0.08154296875,
-0.016845703125,
-0.0634765625,
-0.06787109375,
-0.0031280517578125,
0.04443359375,
0.0164794921875,
-0.091796875,
0.040771484375,
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0.0277099609375,
-0.0135498046875,
0.00064849853515625,
-0.00102996826171875,
0.04345703125,
0.002334594... | 2,362 | 2362 | |
Algebra, Problems For Fun (38)
August 2nd 2009, 06:44 PM #1
MHF Contributor
Joined
May 2008
Posts
2,295
Thanks
7
Algebra, Problems For Fun (38)
Let $R$ be a ring which is not necessarily commutative or with identity element. Suppose that there exists an integer $n \geq 0$ such that $2x = 0$ and $x^{2... | 5 | [
0.010009765625,
0.09033203125,
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0.045654296875,
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-0.0250244140625,
0.0380859375,
0.03515625,
-0.036376953125,
0.01422119140625,
-0.0240478515625,
-0.0111694... | 2,363 | 2363 | |
Posts about Benidorm on Xi'an's Og
Since Bayes factor approximation is one of my areas of interest, I was intrigued by Xiao-Li Meng’s comments during my poster in Benidorm that I was using the “wrong” bridge sampling estimator when
trying to bridge two models of different dimensions, based on the completion (for $\thet... | 4 | [
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0.1396484375,
-0.007293701171875,
0.0756835... | 2,364 | 2364 | |
SparkNotes: SAT Subject Test: Math Level 1: Explanations
12.1 Logic 12.5 Key Formulas
12.2 Sequences 12.6 Review Questions
12.3 Limits 12.7 Explanations
12.4 Imaginary and Complex Numbers
Explanations
1. C
If a statement is false, the contrapos... | 4 | [
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-0.01623... | 2,365 | 2365 | |
Variety of questions...
June 2nd 2007, 04:04 PM
Danielisew
Variety of questions...
Hey, i really need help with some kinds of questions and appreciate greatly any help I can get! I got a real GCSE test coming up on Monday! (I live in the UK...) Thanks :)
Q1: Below is a rough graph that shows a circle of rad... | 4 | [
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G(x) in respect to F(X)
March 17th 2009, 03:41 PM #1
Let g and h be any two twice-differentiable functions that are defined for all real numbers and that satisfy the following properties for all x:
(I) $(g(x))^2$+ $(h(x))^2$=1
(II) $g'(x)=(h(x))^2$
(III) $h(x)>0$
(IV) $g(0)=0$
(a)Prove that $... | 4 | [
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0.0390625,
0.06787109375,
-0.002... | 2,367 | 2367 | |
tion
Uniform Circular Motion
Uniform circular motion means that a particle is traveling in a circular path at constant speed. For an object of mass m to execute uniform circular motion with speed v and radius r, it must be
subjected to a net force that
i. is always directed centripetally, i.e. in towards the center ... | 5 | [
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0.013427734375,
0.014404... | 2,368 | 2368 | |
Discussions taking place on other forums [Protection]
09-12-2012 12:00 PM #31
Theorydin
09-12-2012 09:57 AM #30
Theorydin
09-12-2012 09:30 AM #29
Established Registrant
09-12-2012 09:26 AM #28
Son of Megatron
09-12-2012 09:23 AM #27
Theorydin
09-12-2012 08:58 AM #26
Established Registrant
09-12-2012 08:53 AM #25
... | 4 | [
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0.09375,
0.08935546875,
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Problem 30
Show that $\sum_{n=1}^{\infty}nx^{n-1} = \frac{1}{(1-x)^2}$ for $|x|<1$without differenciating the geometric power series.
Let $S_n=\sum_{k=1}^nkx^{k-1}$ We have $S_n=1+2x+3x^2+\ldots +nx^{n-1}$ (1). Multiplying (1) with $x$ we have $xS_n=x+2x^2+3x^3+\ldots +(n-1)x^{n-1}+nx^n$ (2) Substracting (2) from (1) ... | 5 | [
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QUADRATIC EQUATIONS TUTORIAL for Physical Sciences
In physics, mathematics is used continuously. As the maths gets more tricky, it seems to lose familiarity and maths classes seem to have nothing to do with the maths in physics.
Maths classes seem only to use "x, y, z" whereas physics seems to use "s, v, t, a" and ot... | 4 | [
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-0.0083618164... | 2,371 | 2371 | |
Germfarm math
March 11th 2008, 02:09 AM #1
Junior Member
Joined
Mar 2008
Posts
51
Germfarm math
in a germfarm the germs increase exponentically that means after every 20 minutes the germs double in quantity.
a) at 12 oclock the germs are 700. how many are they at 15 oclock?
B) how many where th... | 5 | [
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Derivative/Tangent Line Question
September 17th 2007, 09:57 PM #1
Junior Member
Joined
Jun 2007
Posts
26
Derivative/Tangent Line Question
1. Find an equation of the tangent line to the graph of f at the indicated point.
f(x) = 1/x+1
(0,1)
2. Find an equation of the line that is tangent to t... | 4 | [
-0.05810546875,
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0.07421875,
-0.1162109375,
-0.0776367187... | 2,373 | 2373 | |
Using Excel Formulas to Rank Ordered Lists
March 6, 2010 5:14 PM Subscribe
Excel question: I have a list of values, sorted from lowest to highest. I want to rank them. But I have a specific issue with regard to ties, and I'd like to be able to craft an Excel formula which
will deal with this automatically, if possibl... | 4 | [
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0.050... | 2,374 | 2374 | |
Classical Information
Other Links:
The 1948 paper that founded Information Theory, by mathematician Claude E. Shannon of Bell Labs.
A series of lectures by David MacKay explaining Information Theory. MacKay has also published an on-line text, Information Theory, Inference, and Learning Algorithms
An on-lin... | 4 | [
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0.051513671875,
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... | 2,375 | 2375 | |
Find the value of 'trig of inverse trig' questions
$tan(arccos(\frac{\sqrt2}{2})) = tan(\frac{\pi}{4}) = 1$ what you need to notice: $cos(\frac{\pi}{4}) = \frac{\sqrt{2}}{2}$ what you need to remember: $arccos(cos(x)) = cos^{-1}(cos(x)) = x$ $\
therefore arccos(cos(\frac{\pi}{4})) = arccos(\frac{\sqrt{2}}{2})$ so, $\fr... | 4 | [
0.0145263671875,
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0.059326171875,
0.004608154296875,
0.004119873046875,
0.028564453125,
-0.03247070312... | 2,376 | 2376 | |
How to manually find a square root
How to manually find a square root
Here is an almost-forgotten art: one that, with the advent of electronic calculators, will likely survive to the twenty-first century only on paper and in the memorie... | 4 | [
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Homework Help
Posted by Anonymous on Sunday, January 16, 2011 at 7:22pm.
solve for u, u=sqrt -u+6
u=-u+6
• algebra - helper, Sunday, January 16, 2011 at 7:38pm
do you mean
u = (sqrt(-6 + u))
please use the word 'sqrt' and put in ()
what is included under the radical
we will be able to assis... | 4 | [
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... | 2,378 | 2378 | |
A quintic equation!
August 28th 2009, 10:27 AM #1
MHF Contributor
Joined
May 2008
Posts
2,295
Thanks
7
A quintic equation!
Solve this quintic equation: $x^5+ax^3 + \frac{1}{5}a^2x + b = 0, \ \ a,b \in \mathbb{R}.$
Note: You don't have to find the roots. Just show us how to find them!
Let me... | 5 | [
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0.02587890625,
0.00013256072998046875,
-0.0007553100585937... | 2,379 | 2379 | |
Develop algebraically an equation...
August 27th 2008, 01:02 AM #1
Newbie
Joined
Aug 2008
Posts
14
Develop algebraically an equation...
that related the height of students arm span to their height. I have collected the arm span and height in cm of 15 students in my class and have graphed them in a scatte... | 4 | [
-0.016357421875,
0.016357421875,
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0.0693359375,
0.1416015625,
0.033447265625,
0.11181640625,
0.06494140625,
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0.09326171875,
-0.04296875,
0.... | 2,380 | 2380 | |
Proof involving Wilson's theorem.
December 10th 2010, 10:07 PM
HelloWorld2
Proof involving Wilson's theorem.
Hey, I was just wondering gif someone could help me prove the following.
((p-1)/2)!)^ 2=(+ or -) 1 mod (p), where p is prime.
THanks
December 11th 2010, 02:39 AM
tonio
Quote:
For p... | 4 | [
-0.05029296875,
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0.049560546875,
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0.022216796875,
-0.0517578125,
-0.02734375,
0.047607421875,
-0.062011... | 2,381 | 2381 | |
what is jk?
August 19th 2012, 02:03 PM
slapmaxwell1
what is jk?
ok so here we go...
we have the set up which states that only students within a certain range, can use the trombone...
so 95 is less than equal to T which is less than equal to 185..
now this next part i found on the internet...but it... | 4 | [
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-0.... | 2,382 | 2382 | |
Homework Help
Posted by Elaine on Wednesday, September 19, 2012 at 8:51am.
Bob jumps from a 2.0 m high table and wants to jump over a 0.85 m radius ball. How fast must Bob move horizontally to not land on the ball?
If we use kinematics equations for projectile, the answer is 2.66 m/s; however, with this velocity the ... | 4 | [
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Where do I start? McLauren series
February 27th 2009, 03:51 PM
thehollow89
Where do I start? McLauren series
f(x) = (x - sinx)/x^3 if x doesn't equal 0
1/6 if x = 0
Where do I start? I was thinking 1/x^2 - sinx/x^3 and then manipulate the sinx series, but I'm not sure if that's what I'm supposed to do.
... | 5 | [
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... | 2,384 | 2384 | |
find the general solution
April 7th 2009, 02:19 PM #1
Member
Joined
Feb 2008
Posts
125
find the general solution
Find the general solution using the method of elimination
x'=x+2y+z
y'=6x-y
z'=-x-2y-z
I used a matrix and found
D^3 + D^2 - 12D=0
and then I think
x(t)= A + Be^(-... | 5 | [
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0.0196533203... | 2,385 | 2385 | |
Probability (Bridge Hands)
September 13th 2007, 06:01 PM #1
Newbie
Joined
Sep 2007
Posts
3
Hello this is my first posting so I hope I'm doing everything right!
Okay so here is the question
----------------------------
What is the probability that a Bridge Hande (13 cards) contains:
a) 4 s... | 4 | [
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0.06982421875,
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... | 2,386 | 2386 | |
Exercises
Chapter6: Time Value of Money Concepts
Exercises
An alternate exercise and problem set is available on the text website: www.mhhe.com/spiceland6e
E 6-1 Future value; single amount ●
LO2
Determine the future value of the following single amounts:
E 6-2 F... | 4 | [
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0.04736328125,
0.00021457672119140625,
0.009765625,
0.045166015625,
-0.06005859375,
0.005035400390625,
-0.0380859375,
0.01348876953125,
0.00469970703125,
-0.10498046875... | 2,387 | 2387 | |
Peak of graph
January 21st 2010, 04:28 AM #1
Junior Member
Joined
Jan 2010
Posts
42
[Solved] Peak of graph
I read somewhere that you can get the coordinates for the peak of a quadratic equation by just rearranging the equation. I forgot how it was done though. Something like
$y=(x+p)^2+q$
is th... | 4 | [
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0.08251953125,
-0.06884765625,
-0.0732421... | 2,388 | 2388 | |
Please HELP with Circle segment question
June 5th 2008, 08:26 PM #1
Newbie
Joined
Jun 2008
Posts
5
Please HELP with Circle segment question
I have tried some many times and failed been working on this for days still can crack it. Any help will be appreciated.
A flexible wire PQRS, of total len... | 5 | [
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Please help simplify (x+y) / (x-y)
April 13th 2013, 09:29 PM #1
Newbie
Joined
Mar 2013
From
A
Posts
3
Please help simplify (x+y) / (x-y)
Hi,
According to wolfram alpha x+y / x-y can also be represented as [-(2x)/(y-x)] -1
When it is in this form it works for me I just can't seem to get i... | 4 | [
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0... | 2,390 | 2390 | |
A METHOD FOR THE ESTIMATION OF VARIABLES OF PERMANENT MAGNET MOTOR STATE - POLITECHNIKA GDANΉSKA
Title:
A METHOD FOR THE ESTIMATION OF VARIABLES OF PERMANENT MAGNET MOTOR STATE
Document Type and Number:
WIPO Patent Application WO/2010/016782
Kind Code:
A1
Abstract:
A method for the estimation of variables of per... | 4 | [
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-... | 2,391 | 2391 | |
Trig Expressions and Identities.
March 22nd 2009, 06:45 PM
amanda0603
Trig Expressions and Identities.
Hey all if you could please help i would be so grateful!
1. Mulitply and simplify-
cosXsinX(secX-cscX)
I got 1 by turning it into 1 but Im not 100% sure.
2. Simplify expression-
(15tanXcsc... | 4 | [
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How to calculate the
December 30th 2009, 12:36 PM
Hamster Jam
How to calculate the
...solution of a congruence with modulo notation from the reciprocal
Hey guys, new to the forum. I have been looking through my notes and I am stuck on an area of my number theory module.
I understand the modulo notati... | 5 | [
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[no subject]
I believe the basic... | 5 | [
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-0.06... | 2,394 | 2394 | |
limit points of Aintersect B, closure of (AintersectB)
I was given a problem from my book.
a) If y is a limit point of AUB, show that y is either a limit point of A or a limit point of B.
b) Prove that (AUB) closure=A closureUBclosure
c) Does the result about closures in b)extend to infinite unions in s... | 4 | [
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8 Steps to creating an X-bar and s control chart
The 8 steps to creating a $\bar{X}$ and s control chart
Once you decide to monitor a process and after you determine using an $\bar{X}$ & s chart is appropriate, you have to construct the charts.
The $\bar{X}$ & R charts use the range as an approximation of the variat... | 4 | [
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0.08789062... | 2,396 | 2396 | |
If the volume of a right circular cone is reduced by 15% by reducing its height by 5%
September 13th 2013, 05:49 PM #1
Newbie
Joined
Sep 2013
From
Cebu City
Posts
12
If the volume of a right circular cone is reduced by 15% by reducing its height by 5%
If the volume of a right circular cone is reduced... | 4 | [
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Abelian factor group
October 7th 2007, 08:16 PM #1
Super Member
Joined
Mar 2006
Posts
705
Thanks
2
Abelian factor group
Prove that a factor group of an Abelian group is Abelian.
I'm a bit confused by the whole factor group affair, now I assume G is an Abelian group, and suppose that H is a facto... | 5 | [
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Jump-diffusion mean
November 30th 2005, 04:01 AM #1
Newbie
Joined
Nov 2005
Posts
3
Jump-diffusion mean
I have a problem calculating the mean for the following probability distribution,
exp(sum(X))
where the sum is Poisson-distributed with intensity lamda and X is a normal distribution with mean... | 5 | [
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