Find f[g(x)] and g[f(x)].f(x) = 
; g(x) = 2x3
A. f[g(x)] = 16/x3; g[f(x)] = 1/x3
B. f[g(x)] = 4/x3 ; g[f(x)] = 1/x3
C. f[g(x)] = 1/x3 ; g[f(x)] = 4/x3
D. f[g(x)] = 1/x3 ; g[f(x)] = 16/x3
Answer: D
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A. 
B. 
C. 
D. 
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A. - 
, 
B. -2?, 0, 2?
C. -?, ?
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