Question

Diketahui fungsi f(x) = ax+b. jika nilai f(1)= -2 dan f(5)= 2 maka nilai a + b adalah..

Answer 1

F(x) = ax + b
~ Metode eliminasi (mencari nilai A) :
f(1) = -2
f(5) = 2
= 1a + b = -2 - 5a + b = 2
= -4a = 0
= a = 4

~ Metode substitusi (mencari nilai B) :
f(x) : ax + b
: 4a + b = 2
b = 4 : 2
b = 2