The function defined by is

MATHEMATICS · Single correct · AP · AP Precalculus · Exponential and Logarithmic Functions · Exponential and Logarithmic Functions

Problem

The function

f:\mathbb{R}\to\mathbb{R}

defined by

f(x)=x^{2}+1

is (a) onto but not one–one (b) both one–one and onto (c) neither one–one nor onto (d) one–one but not onto