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If f(x)=x, then f'(5)=

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asked Jan 21, 2014 in Calculus by anonymous
   

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f(x) = x ⇒ f(5) = 5 and...

f'(5) = d5/dx = 0

f'(x) would be the derivative of a constant which is always zero
answered Jan 21, 2014 by stg1.stewart Inquisitive Expert (21,460 points)

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