x+x+1/2x+1/4x=100—1
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x+x+1/2x+1/4x=100—1
![x+x+1/2x+1/4x=100—1](/uploads/image/z/20137643-35-3.jpg?t=x%2Bx%2B1%2F2x%2B1%2F4x%3D100%E2%80%941)
X+X+1/2X+1/4X=100-1
2X+3/4X=99
11/4X=99
4X=9
X=9/4 =2.25
2X+3/4X=99
11/4X=99
4X=9
X=9/4 =2.25
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
1x+2x+3x+4x+5x+6x+7x…+99x=100
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
1+x+x^2+x^3+.+x^99+x^100
x/x平方-x+2=2x/x+1
(x^2+x-1)(x^2+x+2)=4
(X+4)(x-2)(x-4),其中x=-1
1/(x-4)(x-3)+1/(x-3)(x+2)+1/(x-2)(x-1)+1/(x-1)x+1/x(x+1)=1/x