Question

Tolong kerjakan no 5 a dan c ,sama caranya,makasih

Answer 1

A. 3^(x + 1) - 3^(x -1)
 =  (3^x) x 3^1 - (3^x) x (3^ -1) ---> substitusi y = 3^x
 = y x 3 - (y x (1/3)
 = 3y - ( y/3)
 = 9y/3 - y/3
 = 8y /3

c. 2 ( 3^(1- x))
  = 2 ( 3^1 . 3^ -x)
  = 2 ( 3 x 1/y)
  = 2 ( 3/y)
  = 6/y