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Diket = f(-1) = 1 dan f(1) = 5.
Jawab = f(-1) = -1p + q = 1
f(1) = 1p + q = 5 _
-2p = -4
p =
p = 2
Nah, sekarang kita cari tau q nya.
Dari f(-1), f(-1) = -1p + q = 1
= -1 x 2 + q = 1
= -2 + q = 1
Berarti, q = 3.
Jadi, rumus fungsi =
f(x) = 2x + 3