defence exam ITBP (Telecommunication) Head Constable Mock Test 2024 Mathematics Relations and Functions Range of a Function
Let R be the set of real numbers and let f: R → R be a function such that f(x) = \(\frac{{1 + {\rm{x}}}}{{1 - {{\rm{x}}^2}}}\) .What is the range of f?
1
R
2
(-∞, ∞)
3
(0, ∞ )
4
(-∞, 0) ∪ (0, ∞)