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a. Tentukan bayangan -3 dan 2
f(-3) = -3.(-3) +6
= 9 + 6
= 15
f(2) = -3.(2) +6
= -6 + 6
= 0
b. Tentukan f(a) = -9
f(a) = -3a+6 = -9
Gunakan Persamaan Linear Satu Variabel
-3a+6 = -9
-3a = -9-6
-3a = -15
a = 5
Maaf kalau salah
a. f(-3)= -3.-3 +6 = 9+6 =15
f(2)= -3.2 +6 = -6+6 =0
b. f(x)= -3x +6
f(a)= -3.a +6= -9
= -3a +6= -9
-3a= -9-6
-3a= -15
a= -15/-3 = 5