已知复数z=(m2+5m+6)+(m2-2m-15)i,当实数m为何值时, (1 发布时间:2017-05-19 19:53 │ 来源:www.tikuol.com 题型:解答题 问题: 已知复数z=(m2+5m+6)+(m2-2m-15)i,当实数m为何值时,(1)z为实数;(2)z为虚数;(3)z为纯虚数.
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