Question

Integral of x^3/(radical(1+x^4)

Answer 1

u=1+x^4
du=4x^3
du/4=x^3?

Answer 2

Very close: \[
u=1+x^4\\
du=4x^3dx\\
\frac {du}4=x^3dx

\]

Answer 3

so is it du/u?

Answer 4

du/4u*

Answer 5

\[
\sqrt{1+x^4}\to \sqrt{u}
\]

Answer 6

right sorry. so du/4 is acceptable?

Answer 7

Yes,

Answer 8

so would it be 1du/4 radical(u) then you integrate it?

Answer 9

yes.

Answer 10

um so,4u^1/2/2?