(adsbygoogle = window.adsbygoogle || []).push({}); Find which value of x....horizontal Tangent Line

1. The problem statement, all variables and given/known data

What is given is F(x)= -4/(x-3)(x+4) and the problem asks for to find the value of x where f(x) has a horizontal tangent line.

2. Relevant equations

I read somewhere else on these forms that using the quotient rule is the key, and that you make F'(x) to be equal to 0. If this is correct, I need some clarification on how it'd be put into the formula.

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# Homework Help: Find which value of x horizontal Tangent Line

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