f(x) = ax + b jika f(2) = 13 dan f(5) = 22 cara menentukan nilai a dan b
Matematika
nurhanifahamalia
Pertanyaan
f(x) = ax + b jika f(2) = 13 dan f(5) = 22 cara menentukan nilai a dan b
2 Jawaban
-
1. Jawaban Arisha
5a+b=22
2a+b=13
eliminasi
3a=9
a=3
substitusi
2a+b=13
2(3)+b=13
6+b=13
b=13-6
b=7 -
2. Jawaban Akdav
f(x) = ax + b
f(2) = a(2) + b = 13
f(5) = a(5) + b = 22
f(2) = 2a + b = 13
f(5) = 5a + b = 22
pakai pengurangan susun hasilnya
-3a = -9
a = -9/-3
a = 3
b = 2a + b = 13
2(3) + b = 13
b = 13-6 = 7