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A.113n n ∞ =??+? ?∑ B.11sin n n ∞ =∑ 1.1 n n C n ∞ =+∑ D.1!n n n n ∞ =∑ 阶行列式314 895111 中元素321a =的代数余子式为 7、设1002A ??= ??? ，则3 A = A.1002?? ? ?? B.3006?? ??? C.1008?? ??? D.3008?? ??? 8、在0,1,2,3,4五个数中任意取3个数，则这三个数中不含0的概率为（） 二、填空题（每小4分，共16分） 9、极限0sin 6lim tan 2x x x →= 10、设函数()3 20 cos x f x t dt =?，求() f x '= 11、设矩阵314035A -?? ??=?? ??-?? ,矩阵1102B -??=????，则 AB =

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