#Integrals help

27 messages · Page 1 of 1 (latest)

stoic raft
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here is what i have so far

pallid elm
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one can easily see that the derivative of x³-x²+x-5 is 3x²-2x+1

lean wigeon
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??

stoic raft
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so is it just the integral of the polynomial multiplied by e^x^3 - x^2 + x - 5?

pallid elm
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you can let u = x³-x²+x-5

lean wigeon
stoic raft
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oh

lean wigeon
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@pallid elm

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How do I become a helper?

pallid elm
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then du = (3x²-2x+1)dx

pallid elm
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cuz I helped a lot

lean wigeon
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I've helped but sti no hope

stoic raft
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then cancel it right?

pallid elm
stoic raft
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(3x^2-2x+1) * du / (3x^2 - 2x + 1)

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thanks @pallid elm

pallid elm
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e^u du

stoic raft
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dx = du/ (3x^2 - 2x + 1)

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so sub dx with du

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then cancel

pallid elm
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oh

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yes

stoic raft
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thanks