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f(-2) = 7 ---> -2a + b = 7
f(-7) = -3 --> -7a +b = -3
kurangkan 5a = 10
a= 2 dan b = 7 + 2a
b = 7+4 = 11
f(x)= 2x+ 11
= - 2a + b = 7
f(-7) = a . (-7) + b
= -7a + b = -33
-2a + b = 7
-7a + b = -3 -
5 = 10
a = 10
5
a = 2
-7a + b = -3
-7(2) + b = -3
-14 + b = -3
= -3 - ( -14 )
b = 11