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f(-2)= 2.-2+6 =2
f(-1)= 2.-1+ 6=4
f(0)= 2.0+6=6
f(1) = 2.1+6 =8
f(2)= 2.2+6=10
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berarti daerah hasilnya adala 2,4,6,8,10
=-4+6
=2
f(-1)= 2.-1+6
=-2+6
= 4
f(0)= 2. -0+6
=0+6
=6
f(1)=2.1+6
=2+6
=8
f(2)=2.2+6
=4+6
=10
jadi range ( daerah hasilnya) adalah {(2,4,6,8,10)}