要使(x3+ax2-x)•(-8x4)的运算结果中不含x6的项,则a的值应为( 发布时间:2017-05-24 13:56 │ 来源:www.tikuol.com 题型:选择题 问题: 要使(x3+ax2-x)•(-8x4)的运算结果中不含x6的项,则a的值应为( )A.8B.-8C.18D.0
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