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October 19, 2025, 11:50:03 am
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Author Topic: need help with anti-derivative and integrals  (Read 1128 times)  Share 

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hard

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need help with anti-derivative and integrals
« on: November 08, 2009, 10:41:52 pm »
0
whats the antidervative of 3a/x

and

how do we intergrate fractions.

and

what is an anti derivative and how do we solve it. cheers
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TrueTears

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Re: need help with anti-derivative and integrals
« Reply #1 on: November 08, 2009, 10:45:57 pm »
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PhD @ MIT (Economics).

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hard

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Re: need help with anti-derivative and integrals
« Reply #2 on: November 08, 2009, 10:48:37 pm »
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Quote from: TrueTears on November 08, 2009, 10:45:57 pm

how did yo lose the x in the first equation. Also why is is there a modula's sign in front of the loge |x| ? is it cause you cannot log a number less than 0? so the integral of 1/x is loge|x| + c
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TrueTears

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Re: need help with anti-derivative and integrals
« Reply #3 on: November 08, 2009, 10:52:14 pm »
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Quote from: hard on November 08, 2009, 10:48:37 pm
Quote from: TrueTears on November 08, 2009, 10:45:57 pm

how did yo lose the x in the first equation. Also why is is there a modula's sign in front of the loge |x| ? is it cause you cannot log a number less than 0? so the integral of 1/x is loge|x| + c
By definition

There is a mod sign because x can not be smaller than or equal to 0.

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PhD @ MIT (Economics).

Interested in asset pricing, econometrics, and social choice theory.

hard

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Re: need help with anti-derivative and integrals
« Reply #4 on: November 08, 2009, 11:35:49 pm »
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Quote from: TrueTears on November 08, 2009, 10:52:14 pm
Quote from: hard on November 08, 2009, 10:48:37 pm
Quote from: TrueTears on November 08, 2009, 10:45:57 pm

how did yo lose the x in the first equation. Also why is is there a modula's sign in front of the loge |x| ? is it cause you cannot log a number less than 0? so the integral of 1/x is loge|x| + c
By definition

There is a mod sign because x can not be smaller than or equal to 0.


thankss TT
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Over9000

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Re: need help with anti-derivative and integrals
« Reply #5 on: November 08, 2009, 11:54:15 pm »
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Quote from: hard on November 08, 2009, 10:48:37 pm
Quote from: TrueTears on November 08, 2009, 10:45:57 pm

how did yo lose the x in the first equation. Also why is is there a modula's sign in front of the loge |x| ? is it cause you cannot log a number less than 0? so the integral of 1/x is loge|x| + c
Its on the cheat sheet with the mod sign so you dont needa try and remember it, just read off the cheat sheet.
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hard

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Re: need help with anti-derivative and integrals
« Reply #6 on: November 09, 2009, 12:04:31 am »
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Quote from: Over9000 on November 08, 2009, 11:54:15 pm
Quote from: hard on November 08, 2009, 10:48:37 pm
Quote from: TrueTears on November 08, 2009, 10:45:57 pm

how did yo lose the x in the first equation. Also why is is there a modula's sign in front of the loge |x| ? is it cause you cannot log a number less than 0? so the integral of 1/x is loge|x| + c
Its on the cheat sheet with the mod sign so you dont needa try and remember it, just read off the cheat sheet.
ahkai cheers
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