(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The function y=x(to the forth)+bx(squared)+8x+1 has a horizontal tangent and a point of inflection for the same value of x. What must be the value of b?

2. Relevant equations

I think you have to find the derivative, set it equal to 0 and solve for x

3. The attempt at a solution

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# Homework Help: Horizontal tangent/point of inflection problem

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