x+y+z=3,3x-y-4z=-2,2x+3y-2z=3
用代入法
人气:365 ℃ 时间:2019-12-01 06:46:42
解答
就写成X=3-Y-Z代入后两个方程,化为了二元一次方程组,
最后答案貌似是x=y=z=1
推荐
- 三元一次方程 2x-3y+4z=11 3x+y-2z=3 z=x+y
- 解三元一次方程x+y+z=6,3x-y-4z=-11,2x+3y-2z=2
- 三元一次方程求解:①x+2z=3,2x+y=2,2y+z=7.②x+y+z=2,3x-y-4z=5,2x+3y-2z=0.
- 三元一次方程求解:x+y+z=2,3x-y-4z=5,2x+3y-2z=0.
- {y+2z=1 2x-3y-4z=-3 3x-2z=5
- I’d have finished the novel if I’d had the time.麻烦解释一下这句话的语法~
- 用适当介词填空He’s busy working( )morning to night
- 已知1<m<n,令a=[logn(m)]^2,b=logn(m)^2,c=logn(logn(m)),则a,b,c得大小关系为
猜你喜欢