(2) √100x

x+2x+3x+.+100x (2) √100x x(x-1)(x-2)...(x-99)(x-100) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 100分x^3(2x-5)(x+1)+(5x+2)(x-1)=0x^2/3+48/x^2=10(x/3-4/x)√x-1+√2x-3+√3x-5+√4x-5=5x-6 用公式法解下列方程(全部解100%采纳) 1.x^2+x-12=0 2.x^2-√2 x-1/4=0 3.x^2+4x+8=2x+11 4.x(x-4)=2-8x 5.x^2+2x=0 6.x^2+2√5 x+10=0 化简 x+2x+3x+...+100x (x+2x+3x+.100x )化简 lim((√1+x^2)+x)/((√x^3+x)-x)x→+无穷大 1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+...+1/(x+100)(x+101) 1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)= 解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x) 1X+2X+3X…+98X+99X+100X=50500X X等于多少? 1x+2x+3x+4x+5x+6x+7x…+99x=100 100(X - 2) + 10X + 2X = 100*2X + 10X + X - 2 - 495 已知x*x-3x+1=0求√(x*x+1/x-2)=? 100×2x+10x+3x+216=100×3x+10×2x+x