Question

Matlab 编程求解（x,y,z) 程序

Answer 1

直接用solve（）函数求解就可以了。你第二方程有问题，现已改。

求解过程如下：

eq1='x=(30^2-40^2+1000^2)/(1000*z)';

eq2='y=(40^2-50^2+1000*x)/(1000*sqrt(3))';

eq3='z=1000-sqrt(30^2-x^2-y^2)';

s=solve(eq1,eq2,eq3);

s.x,s.y,s.z

追问

谢谢，当时急了，写错了已经解决了

Answer 2

>> [x,y,z]=solve('x=(-700+1000^2)/(1000*z)','y=-900+1000*x','z=1000-sqrt(900^2-y^2)')

x =

0.8784591513876958376979860641597
0.74665153780841882488375728818772
- 0.36255534435089958452628864452369 + 1.1794218401643871250188048626917*i
- 0.36255534435089958452628864452369 - 1.1794218401643871250188048626917*i

y =

-21.5408486123041623020139358403
-153.34846219158117511624271181228
- 1262.5553443508995845262886445237 + 1179.4218401643871250188048626917*i
- 1262.5553443508995845262886445237 - 1179.4218401643871250188048626917*i

z =

1137.560008819320409639702368713
1338.3753322643092431449436770733
- 237.96767054181482639232302289312 - 774.12806696463600774472526770416*i
- 237.96767054181482639232302289312 + 774.12806696463600774472526770416*i