# calculus

posted by
**amy** on
.

For x including [–15, 13] the function f is defined by f(x)=x^7(x+4)^6?

For x including [–15, 13] the function f is defined by

f(x)=x^7(x+4)^6

On which two intervals is the function increasing (enter intervals in ascending order)?

( i was able to get the first interval but had problems with the first number on the second. I thought it was zero but its wrong)

1.( -15 to -4)

and

2. (???? to 13)