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Vika26052003
@Vika26052003
July 2022
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Чему равна разность между девятым и пятым числами в ряду: 81,100,121,144...?
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sunnykatherine
Пятый будет 13² девятый 17² и разность 17²-13² =(17+13)(17-13)=30*4=120
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