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Let f: RvecR be a function given by f(x...

Let `f: RvecR` be a function given by `f(x)=a x+b` for all `x in R` . Find the constants a and b such that `fof=I_Rdot`

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fof `=12`

`f circ f(x)=ln ^{(x)}` n `in R`

`f(f(m))=n`

`f(a x+x)=x`

`a(a x+b)+b=x`.

`(a^{2}-x x+a b+b=0.`

`(a^{2}-1) x+a b+b=0` in on iduty in `x`

`a^{2}-1=0` and `a b+b=0`

...
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