Diketahui f(x) = 2x-5x. bila f (a) =7 ,tentukan a By Admin ReiPosted on December 2, 2022 Diketahui f(x) = 2x-5x. bila f (a) =7 ,tentukan a f(x) = 2x – 5x f(a) = 2a – 5a = 7 -3a = 7 a = -7/3