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anggota A = x
f(-2) = 2(-2) + 3 = -1
f(-1) = 2(-1) + 3 = 1
f(0) = 2(0) + 3 = 3
f(1) = 2(1) + 3 = 5
f(2) = 2(2) + 3 = 7
himpunan daerah = {-1, 1, 3, 5, 7} (B)