Question

Show that the function $f:R\to$, defined as $f\left(x\right)=x^2$, is neither one nor onto.

Answer 1

$\begin{array}{c}f\left(x\right)=x^2\\ becausedomainof{x}^{2}is\left(R\right)\\ andrangeis\left[0,\infty \right]\\ \Rightarrow andputx=1,and-1\\ givessamevalues\\ hence,itis\left(manyone\right).\end{array}$