Homework Statement
Indefinite Integral
(x^3)sqrt((x^2)+4)dx
Homework Equations
With an x= 2tan@
and dx= 2 (sec^2)@ d@
The Attempt at a Solution
I get to
8(tan^3)@(sqrt((4tan^2)@+(8sec^2)@d@
Simplified down to
8(tan^3)@(sqrt((12tan^2)@+8d@
After that I'm stuck
The...
Homework Statement
Indefinite Integral (x^3)(e^x)
Homework Equations
The Attempt at a Solution
I know I need to substitute t=x^2
t^(3/2)e^sqrt(t)
U=e^sqrt(t)
du=e^sqrt(t) dt
dv=t^(3/2)
V= (5/2)t^(5/2)
Because it has an exponential function, I know I need to use the...