engineering recuitment GATE ECE 2023-24 Test Series General Aptitude Numerical Ability Numerical Reasoning
A superadditive function f(⋅) satisfies the following property:
\(f\left( {{x_1} + {x_2}} \right) \ge f\left( {{x_1}} \right) + f\left( {{x_2}} \right)\)
Which of the following functions is a superadditive function for x > 1?
1
ex
2
√x
3
1/x
4
e-x