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If (fog) (1)=3, g(1) = 2, g(1) = 1,then ...

If (fog) (1)=3, g(1) = 2, g(1) = 1,then show that f(2)=3.

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`(fog)(1)=3rArrf(g(1))g(1)=3rArrf(2)g(1)=3(thereforeg(1)=2)rArrf(2)1=3(thereforeg(1)=1)rArrf(2)=3`
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