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| rev | Admin | (Created page with "'''Key: D''' <math display = "block"> \begin{aligned} y_{10} &= y_0 + c_1 + \cdots + c_{10} = y_0 + 20 \\ y_{19} &= y_{10} + c_{11} + \cdots + c_{19} = y_0 + 20 + c_{11} + \c...") | May 26'23 at 17:48 | +417 |