問題詳情

5. How many nonnegative integer solutions are there to the equation x1 x2 + x3 + x4 = 21 such that  (12pts)Showenoughwork to get full credits.

參考答案

答案:A
難度:簡單0.892147
統計:A(1704),B(165),C(22),D(19),E(0) #
個人:尚未作答書單:時間取樣、行為觀察記錄的類型、問題行為紀錄-正向行為支持

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