6/17x5/13-5/17x6/13 简便计算

6/17x5/13-5/17x6/13 简便计算 用matlab线性编程 min=8*x1+10*x2+7*x3+6*x4+11*x5+9*x612*x1+9*x2+25*x3+20*x4+17*x5+13*x6>=60;35*x1+42*x2+18*x3+31*x4+56*x5+49*x6>=150;37*x1+53*x2+28*x3+24*x4+29*x5+20*x6>=125;其中x>0,x 怎样解释5x5=6x6? 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) 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 计算5x6和6x5用同一句乘法口决, 计算5x6和6x5用的是同一句乘法口决对不对 巧算：1x2+2x3+3x4+4x5+5x6+6x7...+8x9 (1-1/2x4)x(1-3/3x5)x(1-5/4x6)x(1-7/5x7)x(1-9/6x8)x(1-11/7x9)x(1-13/8x10)x(1-15/9x11) matlab res = Columns 1 through 6[1x74 double] [1x5 double] [1x90 double] [1x198 double] [1x11 double] [1x70 double]Columns 7 through 12[1x2 double] [1x18 double] [1x129 double] [1x52 double] [1x6 double] [1x11 double]Columns 13 through 17[1x39 double X1*3.25+X2*5.2+X3*6.5+X4*9.75+X5*10.4+X6*13+X7*16.25+X8*19.5+X9*22.75+X10*45.5 9又7/8x8+8又6/7x7+7又5/6x6+6又4/5x5 1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9+9x10+10x11 1/1x3+1/2x4+1/3x5+1/4x6+1/5x7+1/6x8 (2X2)/1X3+(4X4)/(3X5)+(6X6)/(5X7)+...+(20X20)/(19X21)==? 1x2+2x3+3x4+4x5+5x6+6x7+7x8+8x9= 1x1-2x2+3x3-4x4+5x5-6x6.-100x100+101x101简便算法答案 1/1x2+2/1x3+3/1x4+4/1x5+5/1x6+6/1x7=