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Let f(X)=(ax+b)/(cx+d) then f[f(x)]=x pr...

Let `f(X)=(ax+b)/(cx+d)` then `f[f(x)]=x` provided that

A

a=b=c=d=1

B

a=b=1

C

a=d

D

a=-d

Text Solution

Verified by Experts

The correct Answer is:
D
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