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# Need someone to check my integration by recognition answers please Tweet

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Hey guys, i have no answers to these but would like to know if I have got them right.

Integral x(3x^2+1)^4 = 1/30(3x^2+1)^5

Integral x^2(2-x^3) = -6(2-x^3)^2

Integral 2x(x^2-5)^3 = 1/4(x^2-5)^4

Thankyouu
2. Re: Need someone to check my integration by recognition answers please
You got one wrong.

Differentiate them yourself.
3. Re: Need someone to check my integration by recognition answers please
I will change the bottom one to 16(x^2-5)^4
4. Re: Need someone to check my integration by recognition answers please
(Original post by Robpattinsonxxx)
I will change the bottom one to 16(x^2-5)^4
That one was correct previously.

Spoiler:
Show

Edit: It's the second one that's in error.
Last edited by ghostwalker; 21-06-2012 at 10:03.
5. Re: Need someone to check my integration by recognition answers please
Hmm i don't see how it's wrong :/
6. Re: Need someone to check my integration by recognition answers please
(Original post by Robpattinsonxxx)
Hmm i don't see how it's wrong :/
What do you get when you differentiate the RHS of the second one then?