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b- 4,5,8,9,10,20
121=11²
169=13²
225=15²
625=25²
10 000=100²
b)64=4³
125=5³
512=8³
729=9³
1000=10³
8000=20³
;)
b)
4-64
5-125
8-512
9-729
10-1000
20-8000