Question

Anyone like to help check 5 attached (fun) integration problems?

Answer 1

I'm fairly sure that the final answer in #1 is wrong, but can't find where.

Answer 2

It looked pretty good to me, probably an arithmetic error

Answer 3

I got this result:
\[\Large \frac{{1088}}{{15}}\pi \]

Answer 4

is it right?

Answer 5

that answer is what wolfram provided @Michele_Laino

Answer 6

I have made my computation by hand

Answer 7

yes, as did I, but checked against wolfram, and they have the same as you

Answer 8

ok! :)

Answer 9

you see where I went wrong?

Answer 10

yes!
you have to write +1/5 not -1/5 at the second step

Answer 11

how do the rest of the problems look? I know that 4 is correct, but am very shaky on 5

Answer 12

sorry you have to write -x^5/5, not x^5/5, there is a little error of sign there

Answer 13

that looks better, thanks

Answer 14

thanks!