1/1x4+1/4x7+…+1/97x100

x1-x2+x3=1x2-x3+x4=21若x1,x2,x3,x4,x5满足方程组 x3-x4+x5=3x4-x5+x1=4x5-x1+x2=5求x2 x3 x4的值2已知 x1+x4+x6+x7=39 x2+x4+x5+x7=49 x3+x5+x6+x7=41 x4+x7=13 x5+x7=14 x6+x7=9 x1+x2+x3+x4+x5+x6+x7=9求x7的值若x1,x2,x3,x4,x5满足方程组 x1-x 1/1x4+1/4x7+…+1/97x100 1/1x4+1/4x7+1/7x10+……+1/97x100SOS!SOS! 100x( 3/1x4 + 3/4x7 +3/7x10 +.3/97x100)=?注：1x4、4x7、7x10等均为分母的大小 数学建模的LINGO使用问题modelmin=x0+x11+x8+x9;x0+x1+x2+x3+x4+x5+x6+x7+x8+x9+x10+x11=11;x0+x1+x3+x4>=4;x1+x2+x4+x5>=4;x2+x3+x5+x6>=4;x3+x4+x6+x7>=3;x4+x5+x7+x8>=3;x5+x6+x8+x9>=4;x6+x7+x9+x10>=4;x7+x8+x10+x11>=2;x8+x9+x11+x0>=2;x9+x10+x0+x1>=1; 小学分数题：1/1x4+1/4x7+1/7x10+.+1/97x100 1/1x4+1/4x7+1/7x11+*******1/97x100=?*是省略号 1/1x4+1/4x7+1/7x10+……+1/2005x2008佼佼我 1/1x4+1/4x7+1/7x10+……+1/2005x2008 1/1x4+1/4x7+……+1/91x94=? 计算：1/（1x4）+1/（4x7）+1/(7x10)…+1/(298x301) 1X4/1+4X7/1+7X10/1+…+2005X2008/1=? 1/1x4 + 1/4x7 + 1/7x10 +…+ 1/91x94=? 1X4/1+4X7/1+7X10/1+…+2005X2008/1=? 1X4分之一+4X7分之一+7X11分之一.+97X101分之一等于多少 1x4+4x7+7x11+……+n(n+3)=?分解因式啊~~~ LINGO运行错误 too many inequality or equality relationsModel:min=160*(x1/2)^2*3.14+x1*240-160*x5*(x6+1);h1=70-70*x7/(x1/2*@sqrt(45*45-(45-45/4)^2));r1=@sqrt((l1-x7)^2-(h1)^2);l1=@sqrt((45-r1)^2+(h1)^2);x1>=220;x4=2;(40*x4)*(l1-x1/2+45+x7)>=x5;x6> 数学matlab写代码,1式：3*x1+3.5*x2+4*x3+4.5*x4+5*x5+5.5*x6+6*x7+6.5*x8=89x1+ x2+x3+x4+x5+x6+x7+x8=200≤x1≤43 0≤x2≤59 0≤x3≤39 0≤x4≤41 0≤x5≤27 0≤x6≤28 0≤x7≤34 0≤x8≤21Yn= （x1,x2,x3,x4,x5,x6,x7,x8）求各种满足