Finding F'(5) from F(x) = f(g(x))

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SUMMARY

The discussion centers on calculating the derivative F'(5) for the function F(x) = f(g(x)). Using the Chain Rule, the derivative is expressed as F'(x) = f'(g(x)) * g'(x). Given the values f'(-2) = 4, g(5) = -2, and g'(5) = 6, the calculation proceeds to F'(5) = f'(-2) * g'(5), resulting in F'(5) = 4 * 6 = 24. The confusion arises from an incorrect initial assumption regarding f'(-2).

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Homework Statement



If F(x) = f(g(x)), where f(-2) = 8, f'(-2) = 4, f'(5) = 3, g(5) = -2, and g'(5) = 6, find F'(5).

Homework Equations



F'(x) = f'(g(x)) * g'(x) - Chain Rule

The Attempt at a Solution



F'(x) = f'(g(x)) * g'(x)
F'(5) = f'(g(5)) * g'(5)
F'(5) = f'(-2) * 6
F'(5) = 8 * 6
F'(5) = 48

The correct answer is 24:confused: which doesn't make sense.
 
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f'(-2) = 4
 

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