3x+5.5=11.5 0.5x+15=21 7.5x-24.5=22 5x/4=10.5
3x+5.5=11.5 0.5x+15=21 7.5x-24.5=22 5x/4=10.5
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+.
2x+3x+4x+5x+x+6x+7x=100
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
35(X-2)+15(5X-6)=(22X-51)+21(3X-4)
35(x-2)-15(5x-6)=(22x-63)-21(3x-4)咋算?
(X+X)+(X-X)+(X*X)+(X/X)=100
(2x-1)/(x-1)(x-2)=(x-5)/(x-2)(x-3) x/2x^2-11x-21=(x+7)/x^2-1
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1