X-(1/3x+5)=15 x是多少怎样算
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
7x-6+5x+1=4x+3-2x求x是多少
小数奥数网xx(x +1)x(x+ 2)x(x +3)=360怎样算?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
2x(2x+5)=(x-1)(2x+5)怎样算?
5x/64-x/25=15 x是多少
值域y=3x/(x²+x+1)是多少?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
(x-3)(x-2)+18=(x+9)(x+1),X是多少啊?
f(x)=3x-(1-x) 怎样求导
若x^2-3x+1=0,则(2x^5-5x^4+2x^3-8x^2)/(x^2+1)的值是多少?
若x^2+3x-(1)/(3)=0,则(x-3)/(3x^2-6x)/[x+2-(5)/(x-2)]的值是多少