Question

Suatu fungsi didefinisikan dengan f(x)=ax+b.Jika f(1)=9 dan f(2)=13,maka nilai f(5) adalah...

Answer 1

Verified answer

Jawab

f(x) = ax+b

f(1)= 9  --> a+ b = 9
f(2)=13 --> 2a + b =13 .....(-)

 - a = - 4
a = 4

a + b=9
4 + b = 9
b = 5

f(x) = ax +b
f(x) = 4x + 5
f(5)= 4(5) + 5
f(5) = 25