calculus
posted by amy .
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)
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