Question

Tentukan nilai fungsi suku banyak berikut!
a. f(2) jika f(x) = 2x^2 + 4x -3
b. f(3/2) jika f(x) = 8x^3 -16x^2 + 3

# ^2 = pangkat 2

Answer 1

f(x) = 2x² + 4x - 3
f(2) = 2.(2)² + 4.(2) - 3
      = 2. 4 + 8 - 3
      = 8 + 8 - 3
      = 13
f(x) = 8x³ - 16x² + 3
f( = 8() - 16 + 3
      = 8. - 16. + 3
      = 27 - 36 + 3
      = - 6

Answer 2

A. f(2) = 2x² + 4x - 3
   f(2) = 2(2)² + 4(2) - 3
   f(2) = 8 + 8 - 3 = 13

b. f(3/2) = 8(3/2)³ - 16(3/2)² + 3
   f(3/2) = 8(27/8) - 16(9/4) + 3
   f(3/2) = 27 - 36 + 3 = -6