SOLUTION: How I can solve this equation If g(x).f(x)= 4 ; at x=4 , g(4)=2 , g'(4) = 1/4 ; calculate f'(4) ???

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Question 1082385: How I can solve this equation
If g(x).f(x)= 4 ; at x=4 , g(4)=2 , g'(4) = 1/4 ; calculate f'(4) ???

Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
At ,



and

Differentiating implicitly,

So at ,




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