2x=y+160 3y=2(x+160) .啷个方程组怎么解?过程.谢谢
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/23 19:58:42
xMkAǿ詰̫$C浻j1ԃ`M/"ROlm/+1Ru0?Ld5{?f2[\'븚e_^]X.?owT-2ݝ?M3Ume;S1/GMl~[`GųrK-:Eǥ$rA^y(ƭ$ 269Ɯa&u;pfXD4ܣ*r"LYں{KMŲc7,
]^$"Q{&@(S[
RF%6ZfN],WZ(c J6Hơ5!R`h:i݇~옦Mx9CeQ(Qi1(Ð"8aVW"Q 3mLJ 3VBYkrE1i#FNY-xDӑ/!
X+y=2,3/x+3/y最小值.)
在线等先化简、在求值(x/y-y/x)除以【|x/y+y/(x)-2】除以|【|1+y/(x)】其中x=1/2,y=1 /先化简、在求值(x/y-y/x)除以【|x/y+y/(x)-2】除以|【|1+y/(x)】其中x=1/2,y=1/3
2(x-y)²-3(x-y)(-y-x)
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
120/(x-y)+120/(x+y)=160/y 怎样化简成x=2y和x=-1/2y
120/(x-y)+120/(x+y)=160/y 怎样化简成x=2y和x=-1/2y 急!急!在线等!
y=X(4-3X) ,y'=4-6x ,y'=0 ,x=2/30
x(x-y)2-(y-x)3
先化简,再求值:【(X+2Y)(X-2Y)-(X+4Y)平方]除4Y,其中X=-2,Y=-3
64× x的6次方×y的12次方=( )2次方=-( )3次方就是:64×x×x×x×x×x×x×y×y×y×y×y×y×y×y×y×y×y×y=( )2次方=-( )3次方
1x=0.5y 2x=2y 3x=4.5y 求规律.(如y=...)如果y是1.5,x是多少?
(y-x)^4(x-y)^3+2(x-y)^6(y-x)
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
计算(x-y)^2×(x-y)^3×(y-x)×(y-x)^2
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
12(x+y)^3(y-x)/【4(x+y)^2(x-y)】
2分之x+y+3分之x-y;4(x+y)-(x-y)谢谢了,
若|x|=3,|y|=2,且|x-y|=y-x,求x+y的值