Find f[g(x)] and g[f(x)].f(x) = 7/(x)4; g(x) = 2x3
A. f[g(x)] = 7x12/686
g[f(x)] = x12/16
B. f[g(x)] = 7/16x12
g[f(x)] = 686/(x)12
C. f[g(x)] = 686/7x12
g[f(x)] = 16/(x)12
D. f[g(x)] = 7x12/16
g[f(x)] = x12/686
Answer: B
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