Question

Suatu fungsi dirumuskan dengan f(x) = ax + b. Jika f(-2) =14 dan f(3) = -1, maka nilai a dan b berturut-turut adalah...

Answer 1

Jawab:

Penjelasan dengan langkah-langkah:

f(x) = ax + b

f(-2) = a . -2 + b

f(-2) = -2a + b

f(3) = a . 3 + b = 1

f(3) = 3a + b = 1

3a + b = 1        

-2a + b = 0

a = 1

f(x) = ax + b

  -2  = 1(-2) + b

-b      = -2 +2

b       = 0

Answer 2

Jawab:

F(-2) = -2a + b = 14| x 3

F(3) = 3a + b = -1| x2

F(-2) = -6a + 3b = 42 +

F(3) = 6a + 2b = -2

5b = 40 a = -3 3a + 8 = -1

b = 8. 3a = -9

a = -3