1 In mathematics, e is one of the most commonly used transcendental numbers. For the definition and derivation of e, please refer to page 53 of the first volume of Advanced Mathematics (Tongji Fifth Edition). Usually used as the base of natural logarithm, that is, In(x)= logarithm of x with base e or e x is an exponential function.

2 Even-numbered functions (1) satisfy that the domain of the function is symmetric about the origin. (2) Functions that satisfy the relation f(-x)=f(x) are even-numbered functions.

Whether the function of 3 increases at (0, positive infinity) mainly depends on whether f(x) is an even function when X 1 < X2 and F (X 1) < F (X2).

The even function in your answer is y=e lxl power.