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205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:04:02
are you solving that?
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:04:11
I know M is correct
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:04:17
yeah M is correct
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:04:22
not sure if p is correct
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:04:25
the augmented matrix is [M-I | 0]
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:04:29
if youre solving that
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:04:36
why zero?
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:04:44
RHS to LHS
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:04:47
then the first equation becomes
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1
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:05:04
(0.25 - 1) pf + 0.15 pt + 0.25 pc + 0.18 pcm + 0.20 psb** = 0**
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:05:07
same for the rest
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:05:10
it's all equals 0
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:06:09
np.zeros((M.shape[0], 1))
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:06:45
`np.concatenate((M, np.zeros((M.shape[0], 1))), axis=1)`
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:07:09
ahh
0
1
410,428,562,387,238,900
Torped0
6599
Torped0
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:07:19
can you slow it down for me
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:07:31
and restate like i am a toddler why the right side should be zero?
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:08:00
do you see the equivalence there
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:08:02
in the picture
0
1
835,603,021,425,148,000
rechonchota
2320
rechonchota
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:08:17
what the
0
1
835,603,021,425,148,000
rechonchota
2320
rechonchota
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:08:18
that picture is wrong
0
1
410,428,562,387,238,900
Torped0
6599
Torped0
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:09:00
https://cdn.discordapp.c…4472/unknown.png
unknown.png
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:09:04
now it's right
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:09:21
yeah so you make the matrix from the system
0
1
835,603,021,425,148,000
rechonchota
2320
rechonchota
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:09:46
with the system of equations you have
0
1
835,603,021,425,148,000
rechonchota
2320
rechonchota
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:09:51
er did you delete it
0
1
835,603,021,425,148,000
rechonchota
2320
rechonchota
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:10:41
the system of equations you had couldnt be expressed in that augmented matrix form
0
1
485,820,733,537,386,500
Brun。
4818
Brun。
false
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:10:51
because the RHS has to be all constant to do that
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:11:01
so make that form first
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:11:27
I see
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:11:40
but I though the right hand side was constant?
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:11:50
your RHS was all variables
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:11:57
it had like p_F and stuff
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:12:01
Oh I see
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:12:29
like how you solve equations
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:12:38
2x + 3 = x
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:12:43
how do you get rid of the x on the RHS?
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:15:26
yeah so you do the same thing
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:15:32
minus p_F to both sides for the first one
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:15:37
minus p_T to both sides for the second one
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:15:42
thats how you got M **- I**
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:16:09
But I is an identy matrix
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:16:16
how does that move vars to the LHS
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:17:01
also in numpy how do I now get the values of `pf`, `pt`,... ?
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:17:09
will numpy actually show them to me?
0
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:17:31
no that's linear algebra
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:17:37
you somehow manipulate the augmented matrix to get pf pt ..
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:17:53
try doing the minus thingy
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:01
dont actually fully evaluate stuff and dont reorder any terms
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:10
so if you have like 1.2 p_f + 2 p_t = p_f
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:11
change it to
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:18
(1.2 - 1) p_f + 2 p_t = 0
0
1
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null
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:21
for every single one of them
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:26
and see how that's equivalent to M - I
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:18:49
but `I` only has one and zeros?
0
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:18:59
yeah try it
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:21:21
did you try moving everything on the RHS to LHS
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:23:07
the coefficients are exactly the same as M-I
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:25:48
if your rref is like [I | c]
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:25:50
(c is a constant vector)
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:25:57
then [pf, pt, ...] = c
0
1
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null
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:26:02
its this
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:26:25
oof
0
1
null
null
null
null
null
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:26:30
how am I supposed to know though which var is on row 1
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:26:47
is it just the first one?
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:26:54
yeah
0
1
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null
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:26:56
like would it be pf?
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:26:56
but that rref is bad
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:27:02
well it's not "bad" but
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:27:04
nah, its accurate somehow
0
1
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null
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:27:08
no i mean
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:27:12
you dont know the exact value of pf pt from that
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:27:15
or correct I should say
0
1
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null
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:27:34
ehh, close enough
0
1
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null
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:27:49
is `pf = -0.802` ?
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:27:59
no you cant determine the exact values from that
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1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:28:08
so what good is this then
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:28:08
wtf
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:28:23
this class is so iffy
0
1
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:28:25
well it tells you the solution tho
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:28:38
your system of equations just happens to have infinitely many solutions
0
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help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:28:41
you can convert a system of equations to some augmented matrix
0
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:28:49
now do the reverse to that augmented matrix
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1
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205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:29:16
you mean inverse?
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1
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:29:23
no like
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1
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:29:39
https://cdn.discordapp.c…8502/unknown.png
unknown.png
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:29:41
for example for this
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:29:49
given this matrix
https://cdn.discordapp.c…6074/unknown.png
unknown.png
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1
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null
null
205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:29:56
find this system
https://cdn.discordapp.c…0994/unknown.png
unknown.png
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1
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null
null
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:29:59
but do it with your matrix
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205,593
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65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:30:12
will that give me exact values?
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1
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205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:30:32
try it
0
1
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205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:30:38
idk how
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1
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:30:40
given this
https://cdn.discordapp.c…5918/unknown.png
unknown.png
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1
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null
null
null
205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:30:43
this is my first time using numpy
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205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:30:47
make it into a system of equations
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205,593
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65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:30:53
ok
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1
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205,593
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65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:30:53
no like with a pen on a piece of paper
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205,593
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65d70bec43b84cdb9431cf291a290a2f
321,074,029,291,372,540
Jason_Bjorn
01/22/2022 23:33:52
@xdk1235
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205,593
help-1
65d70bec43b84cdb9431cf291a290a2f
312,559,012,346,331,140
xdk1235
01/22/2022 23:34:03
it's wrong, check the shape carefully
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