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F(4) = 5
F(-2) = -7
A. Nilai a dan b
F(4) = 5
5 = a(4) + b
5 = 4a + b
F(-2) = -7
-7 = a(-2) + b
-7 = -2a + b
Eliminasi
5 = 4a + b
-7 = -2a + b
__________-
12 = 6a
a = 2
5 = 4a + b
5 = 4(2) + b
5 = 8 + b
b = -3
JAWABAN :
a = 2
b = -3
B. Persamaan fungsi tersebut
F(x) = ax + b
Masukkan nilai a dan b
F(x) = 2x - 3 .
Semoga membantu.