# Integration- (Substitution Rule) Help

1. Jan 5, 2009

### jordan123

1. The problem statement, all variables and given/known data
Alright heres the problem. Also it is a definite integral from A=0 and b = 1
$$\int (x^7)(x^4-1)^{1/3}$$

Any help is good.

2. Jan 5, 2009

### HallsofIvy

Staff Emeritus
Well, what have you tried? There is only one subsitution that would make any sense and that is u= x4- 1. What do you get if you try that substitution?

3. Jan 5, 2009

### jordan123

Ok right, exactly. And the new a and b would become a = -1 and b = 0 correct?

4. Jan 5, 2009

### jordan123

Thanks, I got it now!!1