Fungsi f di rumuskan f (x) = 4x+9,f (-1) = a dan f (b) = -3 . Nilai a+b adalah…..

Jawaban:

2

Penjelasan dengan langkah-langkah:

a = f(-1)

= 4 * -1 + 9

= -4 + 9

= 5

f(b) = 4b + 9 = -3

4b = -3 – 9

4b = -12

b = -3

a + b = 5 + (-3) = 2