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f(-3) = -3(-3) + 6
= 9 + 6
= 15
Bayangan dari 2 ~> f(x) = -3x + 6
f(2) = -3(2) + 6
= -6 + 6
= 0
b) Nilai a ~> f(x) = -3x + 6
f(a) = -3a + 6
-9 = -3a + 6
3a = 6 + 9
3a = 15
a = 5
= 15
f ( 2) = -3 (2) +6
= 0
b. f(a) = -3a+6
-9 = -3a+6
3a = 9+6
3a = 15
a = 15 : 3
a = 5