What I_R ,I_NIn etc mean in case we prove gof =IR .

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Solution

$I_{R} means that image or range is choosen from set of real numbers and I_{N} means image or range is choosen from set of natural numbers$

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Let $f : R \to$ be defined as f(x) =10x +7. Find the function $g : R \to R$ such that gof =fog = $I_{R}$ .

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