1/9{7【1/5(x+4)+1】-5}=1 (4x-7)/5-(5x-4)/2=(14-x)/4
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
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
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(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),
3/x-1=4/x 6/x+1=x+5/x(x+1)
方程 3x(7-2x)+5x(2x-1)=4x(x-3)+56
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
计算:1/(x^2-7x+10)+1/(x^2-x-2)+1/(x^2+5x+4)+1/(x^2+11x+28)=( )
x+1分之x+2减去x+3分之x+4=x+5分之x+6减去X+7分之x+8 (解方程)
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980