differentiation of exponential functions question, please help (1 Viewer)

miracu

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Sorry to be a hassle, but the textbook I'm using only gives the answer and shows no working out or gives any similar examples. I get how you found f'(x) but how did you find f'(a) from that point?
 

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Sorry to be a hassle, but the textbook I'm using only gives the answer and shows no working out or gives any similar examples. I get how you found f'(x) but how did you find f'(a) from that point?
You substitute x = a into f'(x). The exponents simply become a/a = 1 and -a/a = -1
 

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