Question

Integrate!

Answer 1

\[\int\limits x^3 e^{x^4} dx\]

Answer 2

sub u = x^4

Answer 3

awww, suddenly it seems easy

Answer 4

lol

Answer 5

suddenly

Answer 6

:) try by parts if u wana make it challenging

Answer 7

lol elementary functions

Answer 8

by parts?

Answer 9

non*

Answer 10

not sure lol I simply said by parts - looks you cannot go far using by parts

Answer 11

jgeurts do u sub

Answer 12

ok so i get
\[\frac{ 1 }{ 4 }\int\limits_{?}^{?} e ^{u}u' du \]
when u = x^4

Answer 13

oh wait get rid of the u'

Answer 14

after integrating i get (1/4)(e^u)(u')

Answer 15

you didnt sub for dx the right way

Answer 16

what is du/dx=?

Answer 17

du/4 = x^3 dx

Answer 18

u=x^4
okay so, sub for that

Answer 19

yeah then i get e^(4x) * x^3