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If f(x)=a-(1)/(x+b), where a+b=1, then: ...

If `f(x)=a-(1)/(x+b),` where `a+b=1,` then: `(f@f@f)(x)=`

A

x

B

`(ax+b)/(x-a)`

C

`(x-1)/(x+b)`

D

none of these.

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The correct Answer is:
A
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