挺急的~已知Z分之X+Y-Z=y分之X-Y+Z=X分之-X+Y+Z且XYZ分之(X+Y)(X+Z)(Y+Z)=-1.x+y+z的值是还想问下这错在哪儿啊~设X+Y-Z/Z=X-Y+Z/Y=-X+Y+Z/X=K则X+Y=Z(K+1),X+Z=Y(K+1),Y+Z=X(K+1)因为XYZ分之(X+Y)(X+Z)(Y+Z)=-1所以(K+1)三次方=-
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/02 12:13:20
![挺急的~已知Z分之X+Y-Z=y分之X-Y+Z=X分之-X+Y+Z且XYZ分之(X+Y)(X+Z)(Y+Z)=-1.x+y+z的值是还想问下这错在哪儿啊~设X+Y-Z/Z=X-Y+Z/Y=-X+Y+Z/X=K则X+Y=Z(K+1),X+Z=Y(K+1),Y+Z=X(K+1)因为XYZ分之(X+Y)(X+Z)(Y+Z)=-1所以(K+1)三次方=-](/uploads/image/z/1834971-51-1.jpg?t=%E6%8C%BA%E6%80%A5%E7%9A%84%7E%E5%B7%B2%E7%9F%A5Z%E5%88%86%E4%B9%8BX%2BY-Z%3Dy%E5%88%86%E4%B9%8BX-Y%2BZ%3DX%E5%88%86%E4%B9%8B-X%2BY%2BZ%E4%B8%94XYZ%E5%88%86%E4%B9%8B%28X%2BY%29%28X%2BZ%29%28Y%2BZ%29%3D-1.x%2By%2Bz%E7%9A%84%E5%80%BC%E6%98%AF%E8%BF%98%E6%83%B3%E9%97%AE%E4%B8%8B%E8%BF%99%E9%94%99%E5%9C%A8%E5%93%AA%E5%84%BF%E5%95%8A%7E%E8%AE%BEX%2BY-Z%2FZ%3DX-Y%2BZ%2FY%3D-X%2BY%2BZ%2FX%3DK%E5%88%99X%2BY%3DZ%28K%2B1%29%2CX%2BZ%3DY%28K%2B1%29%2CY%2BZ%3DX%28K%2B1%29%E5%9B%A0%E4%B8%BAXYZ%E5%88%86%E4%B9%8B%28X%2BY%29%28X%2BZ%29%28Y%2BZ%29%3D-1%E6%89%80%E4%BB%A5%28K%2B1%29%E4%B8%89%E6%AC%A1%E6%96%B9%3D-)
挺急的~已知Z分之X+Y-Z=y分之X-Y+Z=X分之-X+Y+Z且XYZ分之(X+Y)(X+Z)(Y+Z)=-1.x+y+z的值是还想问下这错在哪儿啊~设X+Y-Z/Z=X-Y+Z/Y=-X+Y+Z/X=K则X+Y=Z(K+1),X+Z=Y(K+1),Y+Z=X(K+1)因为XYZ分之(X+Y)(X+Z)(Y+Z)=-1所以(K+1)三次方=-
挺急的~已知Z分之X+Y-Z=y分之X-Y+Z=X分之-X+Y+Z且XYZ分之(X+Y)(X+Z)(Y+Z)=-1.x+y+z的值是
还想问下这错在哪儿啊~
设X+Y-Z/Z=X-Y+Z/Y=-X+Y+Z/X=K
则X+Y=Z(K+1),X+Z=Y(K+1),Y+Z=X(K+1)
因为XYZ分之(X+Y)(X+Z)(Y+Z)=-1
所以(K+1)三次方=-1
所以K=-2
因为2(X+Y+Z)=Z(K+1)+Y(K+1)+X(K+1)
所以K=1
有2个K解啊- -迷茫了
挺急的~已知Z分之X+Y-Z=y分之X-Y+Z=X分之-X+Y+Z且XYZ分之(X+Y)(X+Z)(Y+Z)=-1.x+y+z的值是还想问下这错在哪儿啊~设X+Y-Z/Z=X-Y+Z/Y=-X+Y+Z/X=K则X+Y=Z(K+1),X+Z=Y(K+1),Y+Z=X(K+1)因为XYZ分之(X+Y)(X+Z)(Y+Z)=-1所以(K+1)三次方=-
(x+y-z)/z=(y+z-x)/x=(z+x-y)/y
[x+y]/z-1=[y+z]/x-1=[z+x]/y-1
[x+y]/z=[y+z]/x=[z+x]/y
设[x+y]/z=[y+z]/x=[z+x]/y=k
k[x+y+z]=[(y+z)/x]*x+[(z+x)/y]*y+[(x+y/z]*z=2[x+y+z]
k=2
(x+y)(y+z)(z+x)/xyz
=(x+y)/z*(y+z)/x*(z+x)/y=2*2*2=8
这么简单,就算别人告诉你答案有什么用?你不还是不会,一道题不能让你变成什么,还是自己做吧!!!!!我若是知道还问你阿~?脑残不,我解的K=-2和K=1,错了。我不知道怎么解,不知道自己错在哪里,想看看别人怎么解的,借鉴下。告诉你一个充满哲理的单词 qSIHSIN 反正形容你们这种人的永远不会成功。要成功得做什么。 仔细观察单词,好好想想,比如倒过来看,先写到纸上。倒过来看!我怎么这么无语...
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这么简单,就算别人告诉你答案有什么用?你不还是不会,一道题不能让你变成什么,还是自己做吧!!!!!
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表达清楚点啊!!
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