Q. 43.6( 8 Votes )

If, show that f[f{f(x)}] = x.

Answer :

Given


We need to prove that f[f{f(x)}] = x.


First, we will evaluate f{f(x)}.








Now, we will evaluate f[f{f(x)}]







f[f{f(x)}] = x


Thus, f[f{f(x)}] = x


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