x^:12=x:(7-x)
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
(x+12)(x-2)+(x+7)(x+8)-(x+5)(x-10),其中x=2
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
解方程⑴ x/(2x^2-11x-21)=(x+7)/(x^2-12x+35)
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!)+.
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
4(x+3)=2x+2 7(x-1)=2x+3 4x+20=6x-30 4x-12=2x 2x-3=x+7 3x-4=2
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(X+X)+(X-X)+(X*X)+(X/X)=100
(x+24)+x+(x/2+12)=7x 怎么解
3x^-12x-2根号(x^-4x+7)+13=0