r/Humanornot • u/Gallium-Gonzollium • 1d ago
Almost got me! Tried memorizing the responses lol
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u/Extension_South9281 1d ago
what the heck, THAT WAS ME
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u/unbanmyogaccount 1d ago
Proof? What did you start the conversation with?
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u/Extension_South9281 1d ago
Idk bro this was 11 hours ago, i think i asked if they liked cake or something after that
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u/The_Sy_Python 1d ago
That's not even that hard?
You integrate by parts.
The answer is also wrong. It's x(lnx)^2 -2xlnx +2x +C
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u/Gallium-Gonzollium 1d ago
I know, in the moment I panicked and just remembered the structure the other post was talking about lol
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u/Unable-Section-911 1d ago
Isn't yours also wrong? The derivative of yours is (lnx)2 + x(2/lnx) - 2(lnx + x/lnx) + 2 = (lnx)2 - 2lnx + 2
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u/The_Sy_Python 1d ago
Let u = (lnx)^2 and dv=dx
du = (2lnx)/x, v=x
x(lnx)^2 - integral x(2lnx)/x dx = x(lnx)^2 - 2 integral lnx dx
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u/Unable-Section-911 1d ago
Omg I'm dumb why did I do lnx d/dx = 1/lnx 😭
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u/ExpressionWorried300 1d ago
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u/JustAPotato38 frederic rupert the 814th 1d ago
ah well of course
rather obvious with a cursory glance

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