Diketahui fungsi f (x) = ax +b. jika f (-2) = 7 dan f (-3) = 9, nilai a+b adalah​

Jawaban:

fUnGsi

f(x) = ax + b

f(-2) = -2a + b = 7

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

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a = -2

subsitusikan a = -2 ke :

-2a + b = 7

-2(-2) + b = 7

4 + b = 7

b = 7 – 4

b = 3

maka, nilai a = -2 , dan b = 3

hasil dari :

= a + b

= -2 + 3

= 1