Question

Fungsi f dinyatakan dengan rumus f (x=ax+b)jika f(3)=11 dan f(1)=7.tunjukkan rumus fungsi f(x)..beserta cara...tolong dong pr nih...

Answer 1

F(3) = 3a + b = 11
f(1) = a + b = 7
         --------------  ( dieliminasi )
       2a = 4
       a = 2

a + b = 7
2 + b = 7
b = 5

Answer 2

F(x) = ax + b F(3) = 3a + b = 11 pers1, F(1) = a + b = 7 pers2, Dieliminasi maka f(3) - f(1), b hilang, 2a = 4 a = 2 subtitusikan pada pers1 a + b = 7 2 + b = 7 b = 5