Question: Determine whether each of these functions is a bijection from R to R. a) f (x) = 2x + 1 b) f (x) = x2

Determine whether each of these functions is a bijection from R to R.
a) f (x) = 2x + 1
b) f (x) = x2 + 1
c) f (x) = x3
d) f (x) = (x2 + 1)/(x2 + 2)

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