# Homework Help: How do you integrate this

1. Sep 6, 2010

### shseo0315

1. The problem statement, all variables and given/known data
int((x^2)(e^-3lnx))

anyone tips for this?

2. Relevant equations

3. The attempt at a solution

2. Sep 6, 2010

### Dickfore

Hint:

$$e^{-3 \, \ln{(x)}} = e^{\ln{(x^{-3})}} = ?$$

3. Sep 6, 2010

### shseo0315

now I get int (x^2)(e^(1/x^3)) then? stuck here

4. Sep 6, 2010

### Dickfore

You are wrong. What does $e^{\ln{y}}$ equal to? Use the property that the (natural) logarithm is the inverse function of the (natural) exponential function.