>
数学
>
已知;x/3=y/4=z/6求;(xy+yz+xz)/(X2+y2+z2)
人气:153 ℃ 时间:2020-03-28 12:41:00
解答
令x/3=y/4=z/6=K
则x=3K,y=4K,c=6K
(xy+yz+xz)/(X2+y2+z2)
=(3K*4K+4K*6K+3K*6K)/(3K*3K+4K*4K+6K*6K)
=54K2/61K2
=54/61
推荐
已知x-y=5,y-z=3,求x2+y2+z2-xy-yz-xz的值
已知x-y=5,y-z=2,求x2+y2+z2-xy-yz-xz的值
已知x2 + y2 + z2 = xy + xz + yz = 3 求x+y+z
x/3=y/4=z/6求(xy+yz+xz)/x2+y2+z2=?
x+y+z=4 xy+yz+xz=4求x2+y2+z2的解 已知x2+y2+z2-2x+4y-6z+14=0求x+y+z的解求过程,忘记怎么做了
英语翻译
氢气、甲烷、一氧化碳的检验方法分别是
lim(x->1)(x/(x-1)-1/lnx)这个求极限怎么求
猜你喜欢
像I like the apple.变she like the apple.这样说对吗
生态因素是环境中( )影响生物生活的各种( ),它包括( )和( ).
曹植的七步诗是希望_______;郭沫若的反七步诗是歌颂_____
寻找的英文词组
六年级上册英语利兹版 what are we going to do for our holiday?unit1课文翻译
We will spend lots of money buying books(改为被动语态)
计算:1+2-3-4+5+6-7-8+9+10-11-12+…-2007-2008+2009+2010-2011-2012+2013=_.
THE THINGS THAT YOU HAVE LOST NEVER BELONED TO YOU,SO THERE IS NO NEED TO REGRET LOSING THEM.求翻译~
© 2024 79432.Com All Rights Reserved.
电脑版
|
手机版