The minimum value of function f (x) = 6 / 2 ^ x + 3 ^ x on [- 1,2]? A, 36 / 5 B 6 C 3 D 6 / 13 Tell me why

The minimum value of function f (x) = 6 / 2 ^ x + 3 ^ x on [- 1,2]? A, 36 / 5 B 6 C 3 D 6 / 13 Tell me why


D.