If f:A to B is a function and I(A), I(B)...

If `f:A to B` is a function and `I_(A), I_(B)` are identify functions on A,B respectively then prove that `foI_(A) = f = I_(B)` of

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IPE:MARCH-2018[TS]
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SRISIRI PUBLICATION-IPE:MARCH-2018[TS]-SECTION-C (LAQs)

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