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f(-2) = x(-2)+b= 11 -
8x = -16
x = -2
-2x + b = 11
-2(-2)+ b = 11
b= 11-4 = 7
f(2) = 2x+b
2(-2)+7
=-4+7 = 3
f(-2) = -2a+ b = 11
6a+b =5 Dan -2 +b = 11 dieleminasikan . hilangkan b
maka a = -2
kemudian subtitusikan : 6a + b = -5
6(-2) +b = -5
-12 + b =-5
b = -5+12
= 7
maka , f(2) = -2.2 + (7)
= -4 +7
= 3