Question

Diketahui fungsi f (x)=ax+b. jika f (4)=14 , f (3)=9 . Tentukan : f (-2)=?

Answer 1

Semoga bermanfaat..^_^

Answer 2

Diket: f(x)=ax+b
f(4)=14
f(3)=9
f(-2)=?
jawab: f(x) =ax+b
f(4)=14 maka 4a+b =14
f(3)= 9. maka 3a+b=9
(dikurang) 1a. =5
a. =5/1
a. =5
f(x) = 4a+b =14
= 4(5) + b=14
x +b. =14
20+b =14
b= 14-20
b= -6
f(x)=ax+b
f(x)=5x-6
f(-2)=5.-2-6
=-10-6
=-16