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f(1)=2(1)-3
= 2-3=-1
f(2)= 2(2)-3
= 4-3=1
f(3)=2(3)-3
=6-3=2
f(4)=2(4)-3
= 8-3=5
f(5)=2(5)-3
=10-3=7
jadi daerah hasil adalah {(-1,1,2,5,7)}