Dear All!

please, can someone help me solve this:

would it be proper:

what to do now?

Thanks in advance!

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- Jan 26th 2013, 08:25 AMBooint3egral , polinomials
Dear All!

please, can someone help me solve this:

would it be proper:

what to do now?

Thanks in advance! - Jan 26th 2013, 08:38 AMa tutorRe: int3egral , polinomials
It's OK to look up (or remember) a standard integral like this.

If you want to do it yourself you can use the substitution

Haha. I think you finished the problem while I was typing my post.

Apart from 12 x 1/4 = 3 of course, but really you're finished. - Jan 26th 2013, 09:05 AMBooRe: int3egral , polinomials
Thanks tutor!

Still have to check if they ment sth else!!!

:) - Jan 30th 2013, 06:23 AMBooRe: int3egral , polinomials
Hello!

Please, the answer should be:

Please, the hell, how to get it???

many thanks!!! - Jan 30th 2013, 06:49 AMa tutorRe: int3egral , polinomials
- Jan 30th 2013, 07:32 AMhollywoodRe: int3egral , polinomials
The result you give is instead of . Did you copy the question correctly in your original post?

- Hollywood - Jan 31st 2013, 06:10 AMBooRe: int3egral , polinomials
Ujoj!!!

The first one with is right!!!

Seems I could solve "my version" but I cant solve the one they worte in the book... - Jan 31st 2013, 06:13 AMBooRe: int3egral , polinomials
- Jan 31st 2013, 08:33 AMhollywoodRe: int3egral , polinomials
You would factor as and use partial fractions. It'll take a lot of work, but there's no trick or anything. Just follow the method and the answer should come right out.

- Hollywood - Jan 31st 2013, 09:29 AMBooRe: int3egral , polinomials

Do we eliminate now x^3 and x^1 as it should be zero-I suppose?

Am I right till now???

Many thanks!!! - Feb 1st 2013, 11:50 PMhollywoodRe: int3egral , polinomials
That's the correct idea, but you're making mistakes. Here's what I got:

We can equate all four coefficients:

Next you can solve for A, B, C, and D - four equations in four unknowns. You should get and . Now you can integrate the two functions - do you know how?

- Hollywood