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If f(x)=x-1, g(x)=3x , and h(x)=5/x , th...

If `f(x)=x-1, g(x)=3x , and h(x)=5/x` , then `f^(-1)(g(h(5)))`=

A

4

B

3

C

`5/6`

D

`1/2`

Text Solution

Verified by Experts

The correct Answer is:
A
h(5) = 1.g(1) = 3. Interchange x and y to find that `f^(-1)(x) = +1`, and so `f^(-1)(3) = 4`.
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