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If f(x)=(x)/(x-1), then what is (f(a))/(...

If `f(x)=(x)/(x-1)`, then what is `(f(a))/(f(a+1))` equal to?

A

`f(-(a)/(a+1))`

B

`f(a^(2))`

C

`f((1)/(a))`

D

`f(-a)`

Text Solution

Verified by Experts

The correct Answer is:
B

`f(x)=(x)/(x-1)`
`f(a)=(a)/(a-1)`
`f(a+1)=(a+1)/(a+1-1)=(a+1)/(a)`
`:.(f(a))/(f(a+1))=((a)/(a-1))/((a+1)/(a))=(a^(2))/(a^(2)-1)`
`f(a^(2))=(a^(2))/(a^(2)-1)`
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