(1-1/2)x(1-1/3)x(1-1/4)x.x(1-1/99)x(1-1/100)这道题怎么做?
1+x+x^2+x^3+.+x^99+x^100
|x+3|-|2x-1|+|x-2|>1怎么做
(x-3)(x+5)-(x+1)²这道题怎么做?
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
1x+2x+3x+4x+5x+6x+7x…+99x=100
解方程:2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
lim(sin(x^2*cos(1/x)))/x怎么做?
2x/(x^2+x)-1/x=5/(x+1)怎么做?
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