Question
Graph $f(x)=x^{4}-3 x^{3}+2 x-1$ on the interval [-1,3] and estimate the $x$ -coordinates of points at which the tangent line is horizontal.
Step 1
The derivative of $f(x)$, denoted as $f'(x)$, is given by: $$f'(x) = 4x^{3}-9x^{2}+2$$ Show more…
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