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f(-2) = -2p + q = -13 dan
f(3) = 3p + q = 12 -
-5p = -25
p = -25/-5 = 5
-2p + q = -13
⇔ -10 + q = -13
⇔ q = -13 + 10 = -3
Jadi f(x)=px + q ⇔ f(x)=px + q menjadi f(x) = 5x - 3
maka nilai f(5) = 5(5) - 3 = 25-3 = 22
3p + q = 12 -
-5p = -25
P = 5 , q = -3
jadi f(5) = p(x) + q = 5(5) + -3 = 22