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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 `aa n db` such that `fof=I_Rdot`

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The correct Answer is:
`a=1` and `b=0` or `a=-1` and b can be any real number.
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