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Question

If f(x) =x2 and g(x)=2x+1 be two real valued function. Find f(g(x)) and f(x)g(x)

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Solution

f(x)=x2
f(g(x))=f(2x+1)=(2x+1)2
=4x2+4x+1
f(x)g(x)=x22x+1

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