Diketahui f(x) = 2x - 8, Tentukan: a. 2 f(3) - 3 f(8)! b. 4

a. -28, b. 52

Pembahasan

Diketahui fungsi f(x) = 2x - 8.

a. Menghitung 2 f(3) - 3 f(8):
   - Cari nilai f(3):
     f(3) = 2(3) - 8 = 6 - 8 = -2
   - Cari nilai f(8):
     f(8) = 2(8) - 8 = 16 - 8 = 8
   - Hitung 2 f(3) - 3 f(8):
     2(-2) - 3(8) = -4 - 24 = -28

b. Menghitung 4 f(6) - 3 f(-2):
   - Cari nilai f(6):
     f(6) = 2(6) - 8 = 12 - 8 = 4
   - Cari nilai f(-2):
     f(-2) = 2(-2) - 8 = -4 - 8 = -12
   - Hitung 4 f(6) - 3 f(-2):
     4(4) - 3(-12) = 16 - (-36) = 16 + 36 = 52