Is f(x)=(x+7)(x-2)(x-1) increasing or decreasing at x=-1?
1 Answer
Jan 9, 2016
It is increasing if the derivative at
Explanation:
In order to answer this question you need to find
I would suggest using algebra to simplify the function before taking the derivative. While there are several approaches to take, this is the one I chose in order to easily use the product rule.