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Verified answer
1. f(x) = ax+bf(2) = 2
f(3) = 5
f(2) = 2a+b = 2
f(3) = 3a+b = 5
eliminasi
2a+b = 2
3a+b = 5
_________-
-a = -3
a = 3
substitusi
2a+b = 2
2(3) +b = 2
6+b = 2
b = 2-6
b = -4
jadi nilai a= 3 dan nilai b = -4
2. f(x) = ax+b
f(x) = (3)x + (-4)
f(x) = 3x - 4
3. f(9) =...
f(9) = 3(9) - 4
f(9) = 27-4
f(9) = 23
semoga dapat membantu. maaf jika salah