7x－x^2+18=0

1/(x^2+7x)-1/(x^2+7x)+1/(x^2+7X+18)-1/(x^2+7X+12)=0求X X^3-7X^2+18X-24=0 1/(x^2+7x)-1/(x^2+7x+6)+1/(x^2+7x+18)-1/(x^2+7x+12)=0 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 方程(x^3-3x^2+x-2)(x^3-x^2-4x+7)+6x^2-15x+18=0的全部相异实根是如题 x+2/x+3－x+1/x+2=x+8/x+9－x+7/x+8 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值 如果1+x+x^2+x^3=0,求x+x^2+X^3+x^4+x^5+x^6+x^7+x^8的值, 7x－x^2+18=0 (x-1)（x-2）=0 （2x-1）²=9 x²-7x+6=0 x（x-1）=x 2x²-5x-12=0 2(x-1=(x-1)（x-2）=0 （2x-1）²=9 x²-7x+6=0 x（x-1）=x 2x²-5x-12=0 2(x-1=(x-1)（x-2） 2x²+3x-18=0 3x²+2x-5=0 x²-4x-7=0.解一元二 MATLAb编程解方程clear;clcsyms xfor n=1:6X2=solve('(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)+1e-n*x^19=0',x);double(X2)end与直接代入n=1,2,...6算出来 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 matlab中a(x)=x^4+3x^3+9x-18 b(x)=x^5-4x^3-18x+7 c(x)=x^7+6x^5+9x^3-5x^2-2 d(x)=x^9-8x^7+6x^5-4x^4+d(x)=x^9-8x^7+6x^5-4x^4+6x^2+3 求e(x)=a(x)*b(x)*c(x)*d(x) 6X²-7X+1=0,5X²-18=9X,4X²-3X=52,5X²=4-2X 一元6X²-7X+1=0,5X²-18=9X,4X²-3X=52,5X²=4-2X 一元二次方程 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, 8x-5.5x=7.57.2x÷3.6=2 3x＋6x-8x=0.7 12x-2x-5x=4.512x-x=0 5x＋x=1.8 3.2x＋1.8x=64.8x-0.8x=6 6.3-0.3x=9.6 8.6x-8.5x=0.720x-2x=36 9x＋6x=4.5 18x-12x=5.42x-1.6x=3.6 18x＋3x=7×6 1.2x-0.5x=0.71.3x＋2.7x=1 4x-3.2x=6.4 0.8x＋3.2x＋3x=562.8x-2x=7.2 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7