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f(0) = a(0) +b = -2
= b = -2
f(1) = a(1) +b = 0
= a +b = 0
b = -2
a +b = 0 -
-a = -2
a = 2
a +b = 0
2 +b = 0
b = -2
Jadi, rumus fungsi f(x) = 2x +(-2).
-2=b
b=-2
f(1) = a+b
0 = a-2
a=2
f(x)= 2x-2