Fungsi f : x -> -2x + 3
Daerah asal = {-2, -1, 0, 1, 2}
f(x)= -2x + 3
f(-2) = -2(-2) + 3 = 4 + 3 = 7
f(-1) = -2(-1) + 3 = 2 + 3 = 5
f(0) = -2(0) + 3 = 0 + 3 = 3
f(1) = -2(1) + 3 = -2 + 3 = 1
f(2) = -2(2) + 3 = -4 + 3 = -1
Maka daerah asalnya = {-1, 1, 3, 5, 7} (D).
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Fungsi f : x -> -2x + 3
Daerah asal = {-2, -1, 0, 1, 2}
f(x)= -2x + 3
f(-2) = -2(-2) + 3 = 4 + 3 = 7
f(-1) = -2(-1) + 3 = 2 + 3 = 5
f(0) = -2(0) + 3 = 0 + 3 = 3
f(1) = -2(1) + 3 = -2 + 3 = 1
f(2) = -2(2) + 3 = -4 + 3 = -1
Maka daerah asalnya = {-1, 1, 3, 5, 7} (D).