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help-10
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ElegantSort
04/18/2022 17:25:36
didn't get rid of x^2 in the start
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Cassius
04/18/2022 20:42:28
I need some help with LinearModelFit on mathematica and sinusoidal functions
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Cassius
04/18/2022 20:42:51
https://cdn.discordapp.c…9182/unknown.png
unknown.png
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Cassius
04/18/2022 20:43:15
this is my work thus far. just trying to fit the data to basis functions 1, sinpix, cospix
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Cassius
04/18/2022 20:43:55
the issue is
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Cassius
04/18/2022 20:44:05
https://cdn.discordapp.c…2098/unknown.png
unknown.png
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a disappointing son
0540
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Cassius
04/18/2022 20:45:04
sorry i meant to add 1 to the basis function after data, {
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Cassius
04/18/2022 20:46:11
actually you know what i just saw the actual channel i need, sorry
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Cassius
04/18/2022 20:46:14
.close
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sole
04/18/2022 21:07:24
How do you factor 14a2 +a-3
1
0
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sole
04/18/2022 21:22:20
@Helpers
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Sus
04/18/2022 21:23:42
$14a^2+a-3$
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
510,789,298,321,096,700
TeXit
04/18/2022 21:23:46
**Sus**
https://cdn.discordapp.c…012809392168.png
931398012809392168.png
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Sus
04/18/2022 21:23:59
Ping after 15 minutes see #❓how-to-get-help
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Sus
04/18/2022 21:27:10
Ok got it not sure how convenient it is
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TeXit
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TeXit
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
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Sus
04/18/2022 21:27:23
But use vanishing factor
0
1
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
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Sus
04/18/2022 21:27:38
And try to find the zeros of the quadratic
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
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Sus
04/18/2022 21:28:15
It will be a decimal btw
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a disappointing son
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help-10
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Sus
04/18/2022 21:28:22
Like 0.5
0
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815,874,229,278,212,100
sole
04/18/2022 21:29:08
Mm
1
0
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1b0d371209754ddb8f1fa57b0d6481c7
931,398,012,809,392,100
Sus
04/18/2022 21:29:30
Any doubts?
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1b0d371209754ddb8f1fa57b0d6481c7
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sole
04/18/2022 21:31:07
There gotta b a diff way right
1
0
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
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sole
04/18/2022 21:32:18
What about 16x^4 -y^4
1
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help-10
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Sus
04/18/2022 21:33:23
$16x^4-y^4$
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TeXit
04/18/2022 21:33:28
**Sus**
https://cdn.discordapp.c…012809392168.png
931398012809392168.png
0
1
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931,398,012,809,392,100
Sus
04/18/2022 21:33:39
Here you don't need it
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help-10
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Sus
04/18/2022 21:33:57
Because you can use a^2-b^2 formula
0
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Sus
04/18/2022 21:34:07
But i don't think there is any other way in the earlier one
0
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
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sole
04/18/2022 21:34:20
What would it b then
1
0
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help-10
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Sus
04/18/2022 21:34:40
$a^2-b^2=(a+b)(a-b)$
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TeXit
04/18/2022 21:34:45
**Sus**
https://cdn.discordapp.c…012809392168.png
931398012809392168.png
0
1
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help-10
1b0d371209754ddb8f1fa57b0d6481c7
815,874,229,278,212,100
sole
04/18/2022 21:35:04
oh right
1
0
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Sus
04/18/2022 21:35:08
$16x^4-y^4= (4x^2)^2 - (y^2)^2$
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TeXit
04/18/2022 21:35:14
**Sus**
https://cdn.discordapp.c…012809392168.png
931398012809392168.png
0
1
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1b0d371209754ddb8f1fa57b0d6481c7
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sole
04/18/2022 21:40:06
.close
1
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sole
04/18/2022 21:40:12
Thanks @Sus
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help-10
063e26146b0d4089b3ff120862768024
798,049,488,891,150,300
Ziron
04/18/2022 21:41:25
Hey
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Ziron
04/18/2022 21:41:47
I am trying to confirm if I am solving this question correctly
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063e26146b0d4089b3ff120862768024
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Ziron
04/18/2022 21:44:51
https://cdn.discordapp.c…20418_184221.jpg
20220418_184221.jpg
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Ziron
04/18/2022 21:44:56
Number 13
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help-10
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Ziron
04/18/2022 21:45:34
Is it 0 ?
0
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help-10
063e26146b0d4089b3ff120862768024
798,049,488,891,150,300
Ziron
04/18/2022 21:46:11
I make it
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help-10
063e26146b0d4089b3ff120862768024
798,049,488,891,150,300
Ziron
04/18/2022 21:46:22
X + 4/ X + 4
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help-10
063e26146b0d4089b3ff120862768024
798,049,488,891,150,300
Ziron
04/18/2022 21:46:32
But they cancel eachother
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help-10
063e26146b0d4089b3ff120862768024
798,049,488,891,150,300
Ziron
04/18/2022 21:46:39
But it is 0
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help-10
063e26146b0d4089b3ff120862768024
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Ziron
04/18/2022 21:46:54
Is it that simple ?
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help-10
063e26146b0d4089b3ff120862768024
866,394,271,036,866,600
Cynosure
04/18/2022 21:47:17
if they cancel each other it's 1, right?
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help-10
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Ziron
04/18/2022 21:47:28
Yeah
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help-10
063e26146b0d4089b3ff120862768024
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Ziron
04/18/2022 21:47:32
I forgot
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Cynosure
04/18/2022 21:47:48
yeah they cancels so ur right
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help-10
063e26146b0d4089b3ff120862768024
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Ziron
04/18/2022 21:48:08
Thanks for the help @Cynosure
0
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Ziron
04/18/2022 21:48:13
.close
0
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help-10
a0ed665ede6740489ec9817317c9b187
441,205,393,318,871,040
Nam V. Do
11/13/2021 04:10:39
hi,
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Sus
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a0ed665ede6740489ec9817317c9b187
441,205,393,318,871,040
Nam V. Do
11/13/2021 04:10:47
https://cdn.discordapp.c…_at_16.10.26.png
Screen_Shot_2021-11-13_at_16.10.26.png
1
0
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help-10
a0ed665ede6740489ec9817317c9b187
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Nam V. Do
11/13/2021 04:10:55
can anybody help me with this?
1
0
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help-10
a0ed665ede6740489ec9817317c9b187
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ChOCO.BeRRy
11/13/2021 06:14:05
math is so difficult
0
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Cynosure
04/18/2022 21:48:17
ur very welcome
1
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Cynosure
04/18/2022 21:48:24
.close
1
0
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help-10
80f9f26bec6041169c6944e8a98bc591
962,529,745,629,741,000
mdis0nn
04/18/2022 22:36:28
Can someone help me please! it’s inverse functions
https://cdn.discordapp.c…366/IMG_6840.jpg
IMG_6840.jpg
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80f9f26bec6041169c6944e8a98bc591
656,147,982,177,271,800
PROnoob
04/18/2022 22:37:40
composing two inverse functions gives you the identity function
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Sus
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help-10
80f9f26bec6041169c6944e8a98bc591
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mdis0nn
04/18/2022 22:38:15
Can you elaborate please?? i’m sorry i don’t know how to do this at all..
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help-10
80f9f26bec6041169c6944e8a98bc591
656,147,982,177,271,800
PROnoob
04/18/2022 22:40:58
elaborate on what?
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1
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help-10
80f9f26bec6041169c6944e8a98bc591
656,147,982,177,271,800
PROnoob
04/18/2022 22:41:18
composing two functions means you apply one after the other
0
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help-10
80f9f26bec6041169c6944e8a98bc591
962,529,745,629,741,000
mdis0nn
04/18/2022 22:41:42
I get that but i’m more so asking on how to solve question 1..
0
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help-10
80f9f26bec6041169c6944e8a98bc591
656,147,982,177,271,800
PROnoob
04/18/2022 22:41:59
.
0
1
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help-10
80f9f26bec6041169c6944e8a98bc591
656,147,982,177,271,800
PROnoob
04/18/2022 22:42:16
use this fact
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help-10
80f9f26bec6041169c6944e8a98bc591
962,529,745,629,741,000
mdis0nn
04/18/2022 22:42:53
i’m saying this as a visual learner lol.. i’m not asking you to solve the whole question ..
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help-10
80f9f26bec6041169c6944e8a98bc591
656,147,982,177,271,800
PROnoob
04/18/2022 22:43:12
wdym
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mdis0nn
04/18/2022 22:43:49
For question one how would I solve that equation..
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help-10
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mdis0nn
04/18/2022 22:45:18
Uh okay nvm is there someone else that can like explain step by step…?
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551,269,104,800,104,450
EndTimes
04/18/2022 23:15:01
To find the inverse you swap x and y then solve for x
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
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Azzurala
04/18/2022 23:37:48
Hi, I'm doing vector calculus and I am having a bit of trouble computing the supremum and infimum of a function over some closed region
1
0
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:38:05
this is the problem
https://cdn.discordapp.c…7154/unknown.png
unknown.png
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0
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:38:26
so I have showed that there exists a critical point at (0,2) and that it's actually a local minimum
1
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
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Azzurala
04/18/2022 23:38:55
now I want to search for the supremum, which can only occur at the boundary because the region is closed and boudned
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Cynosure
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Azzurala
04/18/2022 23:39:12
so I tried using Lagrange multiplier
1
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
307,070,375,735,459,840
abs_0
04/18/2022 23:39:26
Why does closed and bounded imply supremum is on boundary
0
1
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
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Azzurala
04/18/2022 23:40:12
wait it doesn't?
1
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:40:18
but if you think about something like a 1 var function
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:40:23
and you restrict the domain
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0
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:40:28
the minima might also be at the boundary?
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:40:37
min and max either occur at a cirtiical point or the boundary
1
0
null
null
null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:41:17
oh yea I know, so I'm trying to search for that at the boundary
1
0
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:41:28
and to do that I use lagrange multiplier
1
0
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null
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:41:51
but uh, when I solved it, I get some nonsensical answer, so I don't know if my approach is wrong or my calculations are wrong
1
0
656,147,982,177,271,800
PROnoob
4477
PROnoob
false
1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:42:06
show your work
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1
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null
null
null
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:43:06
https://cdn.discordapp.c…542/IMG_0655.jpg
IMG_0655.jpg
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0
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:43:12
so I got y = 36/10, but that would not give you a real valued x
1
0
null
null
null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:46:07
try x=0?
0
1
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null
null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:46:17
that case you havent checked ig
0
1
null
null
null
null
null
1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:46:35
wait why would x=0 give you the max or the min?
1
0
null
null
null
null
null
1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:46:45
why not?
0
1
null
null
null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:47:10
yea but how would you even prove that?
1
0
null
null
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null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:47:18
prove what?
0
1
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null
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:47:26
that max/min occurs when x=0
1
0
null
null
null
null
null
1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:48:07
well if all the equations are satisfied when x=0
0
1
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null
null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
656,147,982,177,271,800
PROnoob
04/18/2022 23:48:12
that is enough
0
1
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null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:48:27
oh
1
0
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help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:48:31
wait oh I just realised
1
0
null
null
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1,959
help-10
fc0f01395a8940dfb655bbeac44fe2b2
176,965,290,087,677,950
Azzurala
04/18/2022 23:48:43
in that lagrange multiplier working out, I did exclude x = 0 huh
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0
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