应《网络安全法》要求，自2017年10月1日起，未进行实名认证将不得使用互联网跟帖服务。为保障您的帐号能够正常使用，请尽快对帐号进行手机号验证，感谢您的理解与支持！

24小时热门版块排行榜    

小木虫论坛-学术科研互动平台 » 计算模拟区 » 仿真模拟 » MATLAB » 【求助】matlab逆求解方程问题
81/1返回列表
查看: 654  |  回复: 7
只看楼主 @他人 存档 新回复提醒 (忽略) 收藏    在APP中查看
当前主题已经存档。

urion

铁杆木虫 (职业作家)

[交流] 【求助】matlab逆求解方程问题

function fc
syms r t a b p1 v;
y=r*t/(v-b)-a*t/(v*(v+b)+b*(v-b))-p1
v=solve(y,'v') 即可解出变量v的值,
现在y是知道的如果求解出v的值?

谁能给出正确的结果,送5个金币表示感谢!

[ Last edited by urion on 2009-12-9 at 00:10 ]
回复此楼

» 猜你喜欢
1楼 2009-12-08 22:45:08
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

change0618

铁杆木虫 (著名写手)

方丈大师
★
小木虫(金币+0.5):给个红包，谢谢回帖交流
转换成V的多项式，roots解决
赞一下(1人) 回复此楼
2楼2009-12-08 22:47:34
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

urion

铁杆木虫 (职业作家)
楼上能否详细点? 感谢先
赞一下 回复此楼
3楼2009-12-08 23:08:01
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

nono2009

超级版主 (文学泰斗)

No gains, no pains.

优秀区长优秀区长优秀区长优秀区长优秀版主
又是状态方程。
你要解析解还是数值解？
赞一下 回复此楼
4楼2009-12-08 23:28:13
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

urion

铁杆木虫 (职业作家)
只要能把v转化成y的函数就可以
赞一下 回复此楼
5楼2009-12-08 23:32:24
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

urion

铁杆木虫 (职业作家)
谁能给出正确的结果,送5个金币表示感谢!
赞一下 回复此楼
6楼2009-12-09 20:03:00
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

nono2009

超级版主 (文学泰斗)

No gains, no pains.

优秀区长优秀区长优秀区长优秀区长优秀版主

偶很差，试试吧

★
小木虫(金币+0.5):给个红包，谢谢回帖交流
>> syms r t a b p1 v y;
f = r*t/(v-b)-a*t/(v*(v+b)+b*(v-b))-p1-y;
v = solve(f,v)

v =

1/6/(p1+y)*(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)-2/3*(-4*r*t*b*p1-4*r*t*b*y+3*a*t*p1+3*a*t*y-10*p1^2*b^2-20*p1*b^2*y-10*y^2*b^2-r^2*t^2)/(p1+y)/(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)-1/3*(-r*t+p1*b+y*b)/(p1+y)

-1/12/(p1+y)*(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)+1/3*(-4*r*t*b*p1-4*r*t*b*y+3*a*t*p1+3*a*t*y-10*p1^2*b^2-20*p1*b^2*y-10*y^2*b^2-r^2*t^2)/(p1+y)/(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)-1/3*(-r*t+p1*b+y*b)/(p1+y)+1/2*i*3^(1/2)*(1/6/(p1+y)*(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)+2/3*(-4*r*t*b*p1-4*r*t*b*y+3*a*t*p1+3*a*t*y-10*p1^2*b^2-20*p1*b^2*y-10*y^2*b^2-r^2*t^2)/(p1+y)/(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3))

-1/12/(p1+y)*(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)+1/3*(-4*r*t*b*p1-4*r*t*b*y+3*a*t*p1+3*a*t*y-10*p1^2*b^2-20*p1*b^2*y-10*y^2*b^2-r^2*t^2)/(p1+y)/(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)-1/3*(-r*t+p1*b+y*b)/(p1+y)-1/2*i*3^(1/2)*(1/6/(p1+y)*(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3)+2/3*(-4*r*t*b*p1-4*r*t*b*y+3*a*t*p1+3*a*t*y-10*p1^2*b^2-20*p1*b^2*y-10*y^2*b^2-r^2*t^2)/(p1+y)/(-672*p1^2*b^3*y-672*p1*b^3*y^2-48*r*t*b^2*p1^2-48*r*t*b^2*y^2+144*a*t*p1^2*b+144*a*t*y^2*b+48*r^2*t^2*b*p1+48*r^2*t^2*b*y-36*a*t^2*r*p1-36*a*t^2*r*y-224*p1^3*b^3-224*y^3*b^3-96*r*t*b^2*p1*y+288*a*t*p1*b*y+8*r^3*t^3+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*p1+12*3^(1/2)*(4*y*a^3*t^3-192*y^2*p1^2*b^6-128*y^3*p1*b^6-8*r^4*t^4*b^2+4*a^3*t^3*p1-a^2*t^4*r^2-32*p1^4*b^6-128*r*t*b^5*p1^3-64*r^3*t^3*b^3*p1-160*r^2*t^2*b^4*p1^2+8*r^3*t^4*b*a-16*a*t*p1^3*b^4+8*a^2*t^2*p1^2*b^2-40*r*t^3*b*p1*a^2+88*r^2*t^3*b^2*p1*a+112*r*t^2*b^3*p1^2*a-128*y^3*r*t*b^5-16*y^3*a*t*b^4-160*y^2*r^2*t^2*b^4+8*y^2*a^2*t^2*b^2-64*y*r^3*t^3*b^3-128*y*p1^3*b^6-32*b^6*y^4+112*y^2*r*t^2*b^3*a-48*y^2*a*t*p1*b^4-384*y^2*r*t*b^5*p1+88*y*r^2*t^3*b^2*a-40*y*r*t^3*b*a^2-384*y*r*t*b^5*p1^2+16*y*a^2*t^2*p1*b^2+224*y*r*t^2*b^3*p1*a-48*y*a*t*p1^2*b^4-320*y*r^2*t^2*b^4*p1)^(1/2)*y)^(1/3))

[ Last edited by nono2009 on 2009-12-9 at 20:16 ]
赞一下(1人) 回复此楼
7楼2009-12-09 20:13:35
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

urion

铁杆木虫 (职业作家)
请版主带为扣我5个金币给nono2009,感谢!
继续请教nono2009:
>> syms r t a b p1 v y;
f = r*t/(v-b)-a*t/(v*(v+b)+b*(v-b))-p1-y;
v = solve(f,v)

如果我的y是一系列值保存在txt文件中,如何让计算出相应的v值并保存到另一个txt文件中?
赞一下 回复此楼
8楼2009-12-09 20:57:55
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
相关版块跳转 我要订阅楼主 urion 的主题更新
81/1返回列表
普通表情 龙 兔 虎 猫 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[教师之家] 售SCI一区T0P文章，我:8O.55.1.O.5.4,科目齐全,可+急 +5 7lpolszZVXgi 2026-08-14 6/300 2026-08-15 09:28 by sunzitan
[公派出国] 售SCI-T0P文章，我:8O.5.5.1.O.54,科目齐全,可+急 +3 k0dTPqJtl0jt 2026-08-14 5/250 2026-08-15 07:09 by 4wMiSEwB6436
[基金申请] filecode +7 cratir 2026-08-14 11/550 2026-08-15 06:19 by 学员8dgXkO
[公派出国] 售SCI一区T0P文章，我:8.O55.1.O.54,科目全,可十急 +3 7lpolszZVXgi 2026-08-14 5/250 2026-08-15 04:41 by 4wMiSEwB6436
[找工作] 售SCI文章，我:8O5.5.1.O.54,科目齐全,可+急 +4 k0dTPqJtl0jt 2026-08-14 4/200 2026-08-15 02:21 by 4wMiSEwB6436
[基金申请] 各位道友，我要去昆明玩几天，回来见。 +7 Tide man 2026-08-14 8/400 2026-08-15 01:11 by arzu_hma
[基金申请] 咱们一起用铁证分析2026国家社科基金中标与否 +7 启萌科技 2026-08-12 22/1100 2026-08-14 23:45 by Noways
[基金申请] 是这周出结果还是下周出结果？ +4 yuleib84 2026-08-11 4/200 2026-08-14 23:05 by lfy8008
[教师之家] 售SCI一区文章，我:8.O.55.1.O.54,科目齐全,可伽急 +3 HFw0lei2R37i 2026-08-14 5/250 2026-08-14 22:32 by 4wMiSEwB6436
[硕博家园] 请教兼职经验 +3 是阿文鸭 2026-08-09 3/150 2026-08-14 12:07 by HER12025
[基金申请] FileCode能看出啥？ +10 要乐观耀哥 2026-08-10 32/1600 2026-08-14 09:37 by 要乐观耀哥
[基金申请] 静等基金结果 +8 gjjjzhong 2026-08-10 21/1050 2026-08-13 17:56 by 且听虎啸
[基金申请] 重要来源：本周末出结果 +10 瞬息宇宙 2026-08-12 10/500 2026-08-13 15:46 by likettle
[基金申请] Filecode 又变了，巨变 +3 WH3796 2026-08-12 4/200 2026-08-13 14:13 by 小木虫6752397
[基金申请] 分享一下我之前已中青C的计划书的filecode +4 布布和一二 2026-08-11 5/250 2026-08-13 12:56 by cratir
[基金申请] 结合人工智能，周易传统文化，filecode打分制来了，3分以上希望很大。 +3 Tide man 2026-08-12 4/200 2026-08-13 08:35 by ZJTJZ
[基金申请] 2019年青年基金涵评意见，大家看看几个A，几个B? +11 Tide man 2026-08-11 11/550 2026-08-13 07:35 by 撸猫猫
[基金申请] 为什么网上很多人说本周 12号出结果 +6 瞬息宇宙 2026-08-10 7/350 2026-08-11 19:25 by Tide man
[基金申请] 什么时候出结果，有咨询渠道？？？ +3 Tide man 2026-08-11 3/150 2026-08-11 17:54 by kudofaye
[基金申请] 据悉今年马上要出结果了 +7 瞬息宇宙 2026-08-10 8/400 2026-08-10 12:42 by Vivilian
信息提示
关闭
请填处理意见
关闭