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8) dominan={4,5}
maka f(4)=(4)^+7=16+7=23
f(5)=(5)^+7=25+7=32
rangenya {23,32}
9) g(x)=2x+1
range={1,3,5,9,11}
maka, 2x+1=1
2x=0
x=2/0=0
2x+1=3
2x=2
x=2/2=1
2x+1=5
2x=4
x=4/2=2
2x+1=9
2x=8
x=8/2=4
2x+1=11
2x=10
x=10/2=5
jadi domainnya {0,1,2,4,5}