x-1/2x+1/4x+1/7x=5求解

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x-1/2x+1/4x+1/7x=5求解x-1/2x+1/4x+1/7x=5求解x-1/2x+1/4x+1/7x=5求解x-1/2x+1/4x+1/7x=5,移项通分,得:(x²-140x-

x-1/2x+1/4x+1/7x=5求解
x-1/2x+1/4x+1/7x=5求解

x-1/2x+1/4x+1/7x=5求解
x-1/2x+1/4x+1/7x=5,移项通分,得:(x²-140x-3)/28x=0,∵x≠0,∴x²-140x-3=0,用求根公式算一下就可以了

1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11=17.7这个方程怎么样求解? x-1/2x+1/4x+1/7x=5求解 (求解、x+5)/(x-1)-(3x-3)/(x+5)=(8x+28)/(x^2+4x-5)-2 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 求解方程(x-1)/(x²-5x+6)+(x-2)/(x²-4x+3)=(x-3)/(x²-3x+2) x(x+5)=0求解.(2x-2)(x-1)=0求解.x(x+5)=5x-10求解. 请假一下可否用lingo如何求解下面的非线性0-1规划的解?目标函数是:f=300000/(4364.64*(x(1)+x(2)+x(3)+x(4)+x(5)+x(6))+10392*(x(7)+x(8)+x(9)+x(10)+x(11)+x(12)+x(13)+x(14)+x(15)+x(16)+x(17)+x(18)+x(19)+x(20)+x(21)+x(22)+x(23)+x(24 怎样解这两道数学方程式 求解、、、、、、x²+4x-5=0 2x²-7x+1=0 求解x^5+x^4+x^3+x^2+x+1=0 (范围是实数+虚数范围) 4x²-4x+1=0 求解 x (X+1)(X–2)=3X+3求解 求解微分方程x''-1/t*x'+(x')^2=0 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 7x-3(2/3x+1/5x)-(x+2/5x)+2x 求解? 求解不等式 -3x²+5x-4>0 x(1-x)>x(2x-3)+1 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 用matlab求解一个优化问题(目标函数非线性,约束函数线性)min f(x)=12*x(1)+21*x(2)+21*x(3)+13*x(4)+20*x(5)+23*x(6)+15*x(7)+17*x(8)+27*x(9)+17*x(10)+19*x(11)+31*x(12)+200*[(x(1)+x(2)+x(3))^0.6+(x(4)+x(5)+x(6))^0.6+(x(7)+x(8)+x(9)) matlab解数值分析题p=(x-1)*(x-2)*(x-3)*(x-4)*(x-5)*(x-6)*(x-7)*(x-8)*(x-9)*(x-10)*(x-11)*(x-12)*(x-13)*(x-14)*(x-15)*(x-16)*(x-17)*(x-18)*(x-19)*(x-20)解为1,2,3……,20取多个非常小的数用软件工具求解方程p(x)+n*x^19=0,并