Question

Diketahui : f(x) = ax+b
dimana : f(3) = 5 dan f(1) = -1
tentukan nilai a dan b

Answer 1

F(x)=ax+b f(3)=3a+b=5 f(1)=a+b=-1 f(3) - f(1) (3a+b=5) - (a+b=-1) 2a=6 a=6/2 a=3 Substitusikan a=2 ke f(3)=3a+b=5 f(3)=3a+b=5 f(3)=3(3)+b=5 f(3)=9+b=5 b=5-9 b=-4 a=3, b=-4