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f(-2) = -2p + q f(3) = 3p + q
-13 = -2p + q 12 = 3p + q
3p + q = 12
-2p + q = -13 _
5p = 25
p = 5
12 = 3p + q
12 = 15 + q
q = -3
f(5) = 5p + q
= 5 x 5 - 3
= 22
Persamaan2: f(3) = 3p+q = 12
eleminasikan..
3p+q = 12
(-2)p+q = -13
5p = 25
p = 5
3p+q = 12
3(5)+q = 12
q = -3
f(x) = 5x + (-3)
f(5) = 5(5) + (-3)
f(5) = 22 (d)