3x5=15而15=4x4-1 5x7=35而35=6x6-1 …… 11x13=143而143=12x12-1 将你猜想的规律

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 帮我用lingo或者lindo算个题呗?x1+x4+x5+x6+x7>20x1+x2+x5+x6+x7>13x1+x2+x3+x6+x7>10x1+x2+x3+x4+x7>12x1+x2+x3+x4+x5+>16x2+x3+x4+x5+x6+>18x3+x4+x5+x6+x7>20格式不对也改下哈,>在lingo中应该和>=一样吧?min=(5x1+4x2+3x3+3x4+3x5+3x6+4x7) 3x5=15而15=4x4-1 5x7=35而35=6x6-1 …… 11x13=143而143=12x12-1 将你猜想的规律 1/1x2+2/1x3+3/1x4+4/1x5+5/1x6+6/1x7= (2X2)/1X3+(4X4)/(3X5)+(6X6)/(5X7)+...+(20X20)/(19X21)==? 1/2x4+1/3x5+1/4x6+1/5x7+...+1/97x99=?RT 1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9= 线性问题在lingo中的表示minZ=5*x1+7*x2+5*x3+4*x4+6*x5+5*x6+5*x7+3*x8 限制条件25*x1+36*x2+32*x3+15*x4+31*x5+28*x6+22*x7+12*x8>=105.69;然后x1到x8必须是1或者0.这个怎么在lingo软件中正确表示出来 min 3x1+16x2+16x3+50x4+39x5+52x6+45x7+10x8+15x9s.t.56x1+113x4+109x6+179x7+56x8+34x9>=9049x2+45x5>=6060x1+46x3+46x8>=8025x1+7x6+8x7+8x8+5x9>=9040x1+275x4+110x6+55x7>=60x1 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; 1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11+ +nx(n+1)= 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 15(18+X)x7/30=18x5+3X 巧算：1x2+2x3+3x4+4x5+5x6+6x7...+8x9 x1-x2+x3=1 x2-x3+x4=2 x3-x4+x5=3 x4-x5+x1=4 x5-x1+x2=5 求x1,x2,x3,x4,x5 用秦九韶算法计算当X=3时多项式f(x)=7X7+6x6+5x5+4x4+3X3+2x2+X的值 Min Z= X1 +X2 +X3 +X4 +X5 +X6 +X7 +X8S.T.2X1 +X2 +X3 +X4 =1002X2 +X3 + 3X5 +2X6 + X7 =100X1 + X3 + 3X4 +2X6 +3X7 +4X8 =100X1,X2,X3,X4,X5 ,X6,X7,X8 >=0经过计算的最优解是X*= (40 ,20,0,0,0 ,30 ,0 ,0)T Z* =90但该解也是最优解X*= (10 ,50,0 求方程组x1+3x2+x3+2x4+4x5=3 2x1-x2+8x3+7x4+2x5=9 4x1+5x2+6x3+11x4+10x5=15的全部解线性代数