Let a be a postve real number it ts a continuous and even tunction detined on the interval | a, al, then dx is equal to f[x) la, a e j1e (a)tx) dx (b) 2 dx c) 2

Let a be a postve real number It ts a continuous and even tunction detined on the interval | a, al, then dx is equal to f[x) la, a e J1e (A)tx) dx (B) 2 dx C) 2tx) dx (D) 2a d 1