Evaluate the integral using substitution

1. Apr 20, 2010

Econometricia

1. Evaluate the integral [0,ln(3)] of ff(x)=(e^2x + 1)^2 /e^x

I am having trouble locating what to substitute.

2. Apr 20, 2010

Staff: Mentor

No need for a substitution. Just expand (e2x + 1)2 and divide each term by ex.

3. Apr 20, 2010

Econometricia

Last edited: Apr 20, 2010