Let f(x)= x^ 2 -4 x^ 2 +4 , for |x| 2 then the function f:(- ,-2] [2, ) (-1,1) is:
Mathematics · JEE Main · NTA Exams — Sets, Relations and Functions
Let \(f(x)=\frac{x^{2}-4}{x^{2}+4}, \text { for }|x| \geq 2\) then the function \(f:(-\infty,-2] \cup[2, \infty) \rightarrow(-1,1)\) is:
- one-one into
- one-one onto
- many-one into
- many-one onto
Answer
(B) one-one onto
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