设x,y,z∈R,且满足:x2+y2+z2=1,x+2y+3z=14,则x+y+ 发布时间:2017-05-12 14:02 │ 来源:www.tikuol.com 题型:填空题 问题: 设x,y,z∈R,且满足:x2+y2+z2=1,x+2y+3z=14,则x+y+z=______.
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