Question
let g(x) be the inverse of the function f(x), and f/(x) = 1/1+x3 then g/(x) equals
(1) 1/1+g3
(2) 1/1+f3
(3) 1+ g3
(4) 1+f3
Read 1 Solution.
g(x) = f -1(x)
f(g(x)) = x
differentiating both sides
g ' (x) = 1/ f '(g(x))
= 1/ (1 / 1+g3)
(3) is correct.
Best SolutionVISHAL PHOGAT 11 year ago
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