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Q={4<y2<25}={2pangkat2,y pangakt 2, 5 pangkat 2}
Q={3 pangkat 2, 4 pangkat 2}={9, 16}
himp. p ke q= q pangkat p
P=n(p)=3
Q=n(q)=2
q pangkat p= 2 pangkat 3=8
q = {9,16}
n(p) = 2
n(q) = 2
q^p = 2² = 4