Question

The function $\text{f:N}\to \text{Y}$ defined by $f\left(x\right)=x^2,$ $WhereY=\{y:y=x^2,x\in N\}$ is invertible.

• A. True
• B. False

Answer 1

The correct option is A True

$f\left(x\right)=x^2=yy=\sqrt{x}{f}^{-1}\left(x\right)=\sqrt{x}$

Yest the function is invertible.