Question

Diketahui: f(×) = a×+b, jika f (2) =1 dan f (7) =16 tentukan nilai dqri f (10) !


tolong dijawab y? dan

menggunakan caranya?

Answer 1

F(×) = a×+b
f(2) = 2a + b = 1
f(7) = 7a + b = 16

2a + b = 1
7a + b = 16
_________-
-5a = -15
a = -15/-5
a = 3

2a + b = 1
2(3) + b = 1
6 + b = 1
b = 1-6
b = -5


jadi,

f(10) = ax + b
f(10) = 3(10) + (-5)
f(10) = 30 -5
f(10) = 25