7(X-3)=43-X
7(X-3)=43-X
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!)+.
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
初一数学x*x+2x+5的值为7,请求3x*x+6x+3的值.因为x*x+2x2x+3=3x(x*x+2x)+2x+2x
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
5x/(x+3)(x+2)+(2x-5)/(x-4)(x+3)=(7x-70)/(x+2)(x+4)
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
2x²+7x+1=0 x(x-1)=3x+7
2x+3x+4x+5x+x+6x+7x=100
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
1/x-2=7x/(x-2) -3