求解方程很急求学霸解答谢谢
1.(2+2/9)*(1/x+1/y)=1(3+1/13)*(1/y+1/z)=1(2+2/3)*(1/z+1/x)=12.(2+2/9)*(x+y)=1800(3+1/...
1.(2+2/9)*(1/x+1/y)=1
(3+1/13)*(1/y+1/z)=1
(2+2/3) *(1/z+1/x)=1
2.(2+2/9)*(x+y)=1800
(3+1/13)*(y+z)=1520
(2+2/3) *(z+x)=1680 展开
(3+1/13)*(1/y+1/z)=1
(2+2/3) *(1/z+1/x)=1
2.(2+2/9)*(x+y)=1800
(3+1/13)*(y+z)=1520
(2+2/3) *(z+x)=1680 展开
展开全部
(2+2/9)*(1/x+1/y)=1 , U=1/x , R=1/y, L=1/z
(3+1/13)*(1/y+1/z)=1
(2+2/3) *(1/z+1/x)=1
U+R=9/20
R+L=13/40 U-L=1/8
U+L=3/8 U+L=3/8 , U=1/4 , L=1/8, R=1/5 , x=4, y=5, z=8(2+2/9)*(x+y)=1800
(3+1/13)*(y+z)=1520
(2+2/3) *(z+x)=1680
x+y=810
y+z=494 , x-z=316
z+x=630 , z+x=630 , x=473 , z=157 , y=337
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