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f(1) = a. 1 + b
= 1a +b = 2
f(2) = a. 2 + b
= 2a + b = 1
1a + b = 2
2a + b = 1 _
-a = 1
a = -1
-1. 1 + b = 2
-1 + b = 2
b = 2 + 1
b = 3
a). Rumus Fungsi
f(x) = -1.x + 3
b). f(-1) = -1.(-1) + 3
= 1 + 3
= 4
f(x-1) iitu maksudnya f(-1) ? atau giimana._.