[(240-48)/x]+[48/(x-10)]=240//(x-4)
30%x=240 x /5 +x=48 90%-35%x=16.5 x+120% 解方程
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
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
(X-2)X(X+4)=48
4X+2(20-X)=48
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
设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10),
x-4/x-6+x-8/x-10=x-5/x-7+x-7/x-9
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
解方程6X+4(10-x)=48
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少