# Need help solving the integral: (x^2)/(2^x)

1. Jan 6, 2010

### deiru

1. The problem statement, all variables and given/known data

solve the integral ∫[(x^2)/(2^x)]dx evaluating from infinity to 0

2. Relevant equations

3. The attempt at a solution

using integration by parts I get this: ([(ln(2)x]^2 + 2ln(2)x +2)/(2^x)[ln(2)]^3

2. Jan 6, 2010

### sylas

The headache will pass; and you earned it in a good cause. Your integration is correct.

All you need now is to figure the limit as x goes to infinite, and the value when x is zero.

Well done -- sylas

3. Jan 6, 2010