Hi all! I have a hairy integral I need help with!
integrate (x^17) times (e^(-x^8))...I have a picture of it so it is easier to understand...Thanks!

Question

Hi all! I have a hairy integral I need help with!
integrate (x^17) times (e^(-x^8))...I have a picture of it so it is easier to understand...Thanks!

anonymous · Answer

attachment

anonymous · Answer

I think U Substituion is in order of u=x^18 but i'm not sure how they expect me to just immediately see to use that method...any help?

anonymous · Answer

just saw it!

anonymous · Answer

The integral is
$$\int 18x^7e^{-x^{18}} dx$$
Put 
$$x^{18}=u$$
What would you get for du?

anonymous · Answer

Differentiate both sides you'd get something of the form
$$.....dx=du$$

anonymous · Answer

ah thanks frge...i just realized how to do it before you typed in...thank you though for the help!

anonymous · Answer

No problem