Mathematics, 13.12.2021 19:20, merunikitty1226

- Dãy các số tự nhiên chẵn : 2 , 4 , 6 , …có số hạng đầu u1 =?, số hạng tổng quát un = ? - Dãy các số chính phương : 1 , 4 , 9 , …. có số hạng đầu u1 = ? , số hạng tổng quát un =?

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- Dãy các số tự nhiên chẵn : 2 , 4 , 6 , …có số hạng đầu u1 =?, số hạng tổng quát un = ? - Dãy các...