(1/2011-1)x(1/2010-1)x(1/2009-1)x···x(1/1002-1)x(1/1001-1)
【(Xˇ2-X)/x】 ·【 x/(X+1)】+【(3x+1)】
(x)-2x·x-x-2x+1=0求x的值,
计算:(1+1/x)·x²-2x+1/x²-1;(x²/x-1-2x/1-x)÷x/x-1
1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+···+1/(x+2010+(x+2011)
x+1 x x x+1
[x(x+1)+x平方(x-1)]+(-3x)
(x-x²-1/1-x)·x²-2x+1/x²-x+1
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
若1+x+x*x+x*x*x=0,求x+x*x+x*x*x+.+x(2000次幂)
计算(x+4)·(-2x)-(x+1)(x-1)+(-3x+2)(x+1); (3x-y)(y+3x)-(4x-3x)(
若x+x^2+x^3=-1 则x^2012+x^2011+x^2010+x^2009+…………+x^3+x^2+x+1=
2道分式计算[(x+4)(x-2)]/x³+2x²+x÷[(x-2)/x·(x+4)/(x+1)]2