Answer:
(f•g)(x)=16x²+1
(g•f)(x)=4x²+4
Explanation:
f(x)=x²+1, g(x)=4x
(f•g)(x)=f(g(x))
=f(4x)
=(4x)²+1
=16x²+1
(g•f)(x)=g(f(x))
=g(x²+1)
=4(x²+1)
= 4x²+4
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