Question

Fungsi f dinyatakan dengan rumus f(x) = ax + b,jika f(2)=13 dan f(5)=22. tentukan : a)nilai a dan b (b) rumus fungsi f(x) (c) nilai f(10)

Answer 1

F(x) = ax + b
f(2) = 2a + b = 13
f(5) = 5a + b = 22
----------------- -
-3a = -9
a = 3

f(2) = 2.3 + b = 13
6 + b = 13
b = 13-6
b = 7

f(10) = 10.3 + 7 = 30 + 7 = 37