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daerah asal {-2, -1, 0, 1, 2}
f(-2) = 5 - 2(-2) = 5 + 4 = 9
f(-1) = 5 - 2(-1) = 5 + 2 = 7
f(0) = 5 - 2(0) = 5 - 0 = 5
f(1) = 5 - 2(1) = 5 - 2 = 3
f(2) = 5 - 2(2) = 5 - 4 = 1
jadi, daerah hasil fungsi tersebut, adalah {1, 3, 5, 7, 9} ... (c)