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Calculus

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Find the point(s) on the graph where the tangent line is horizontal...
50. Extend the product rule for differentiation to the following case involving the product of three differentiable functions...
Find derivative...
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This solution provides all the steps to solve the given calculus problems

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By quotient rule, f'(x) = [(x^2 + 1) - x(2x)] / (x^2 + 1)^2 = (1 - x^2) / (x^2 + 1)^2
For tangent line to be horizontal, f'(x) = ...

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