已知:a、b互为倒数,c、d互为相反数,|k|=1.求:k(12ab+3c+3d 发布时间:2017-04-15 07:25 │ 来源:www.tikuol.com 题型:解答题 问题: 已知:a、b互为倒数,c、d互为相反数,|k|=1.求:k(12ab+3c+3d)的值.
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