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Asked by
Sara
Given that g is the inverse function of f, and f (3) = 4 , and f ′(3) =5 , then g′(4) =
-1/5
-3/5
3/5
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Answered by
Steve
if f(a) = b then g'(b) = 1/f'(a)
Now just plug in your numbers
Answered by
Sara
Okay so it is 1/4
Answered by
Steve
Huh? Take a look at what I wrote!
f'(3) = 5
f(3) = 4
so, g'(4) = 1/f'(3) = 1/5
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