JEE Main & Advanced
Mathematics
Functions
Question Bank
Numerical Value Type Questions - Relations and Functions-II
question_answer
Let \[f\left( x \right)={{\left( x+1 \right)}^{2}}-1,\] \[\left( x\ge -1 \right)\]. Then the number of elements in the set \[S=\{x:f(x)={{f}^{-1}}(x)\}\] is