>
数学
>
解三元一次方程组,x-y-z=1,2x+y-3z=4,3x-2y-z=-1
人气:332 ℃ 时间:2019-12-10 00:08:40
解答
x-y-z=1(1),2x+y-3z=4,(2)3x-2y-z=-1(3)
(3)-(1)得2x-y=-2 (4)
(2)-3(3)得:-x+y=1 (5)
有(4)(5)得x=-1,代入(5)得y=0,再代入(1)得z=-2
推荐
解三元一次方程组x-2y+z=9 2x+y+3z=10 3x+2y-4z=-3
解三元一次方程组{3x-2y+z=7,2x-y+2z=9,x+3y-3z=-4}
解三元一次方程组 x+2y-z=0 2x-3z=1 3x-y+2z=4
解三元一次方程组{4x-3z=-1,3x+y+z=28,x+2y+3z=38
解下列三元一次方程组 x-y-z=1 2x+y-3z=4 3x-2y-z=-1
--He got the first place in the test!--Not___,he is the most hard-worling student in our class.
How do you like my paper? It's a great , your use of quotations___ A.in theory B.in particular
组优美的句子
猜你喜欢
在光滑水平面上停放着一辆装有光滑弧形槽的小车,小车质量为m,一个质量也为m的小球以水平初速度v沿右端槽
It is true that there are only a few things that can make me happy right now and it seems hopeless.
化简 (a-b)²(a+b)²-(a²+b²)²
6行10字的有哪些古诗 不要标点
六年级一班有70人,男生人数占全班人数的3/7.这个班的女生有多少?想:根据(),把()看作单位1的量
立体几何如何用向量法证线面平行?是求出平面法向量然后证那条线与法向量垂直?
一除以六分之七等于多少?乘五分之八等于多少?除以十五又等于多少?
She says,"There are ( )people in your family."
© 2024 79432.Com All Rights Reserved.
电脑版
|
手机版