- #1
whatisphysics
- 30
- 0
Try using u = x^8
Alright, the integral is:
[tex]\int x^{7}e^{x^{8}}dx[/tex]
I'll choose u = x^8
[tex]du = 8x^{7}dx[/tex]
Here is where you had an issue before, notice that in the original integral I do have x^7dx in it ! This implies I don't need to divide by x^7, I just use the substitution:
[tex]\frac{1}{8}du = x^{7}dx[/tex]
Can you finish it from here?