Find f[g(x)] and g[f(x)] if f(x)=x^2 and g(x)=2^x

Answers (1)

Solution:    

        f[g(x)]=[g(x)]^2=(2^x)^2=2^2x\ \ Rightarrow hspace1cm  g[f(x)]=2^g(x)=2^x^2

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