FunctionMedium
Question
Which of the functions defined below are NOT one-one function(s) ?
Options
A.f(x) = 5(x2 + 4), (x ∈ R)
B.g(x) = 2x + (1/x)
C.h(x) = ln (x2 + x + 1) , (x ∈ R)
D.f(x) = e-x
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