5/9X( )=0.5X( )=1X( )=7/12÷( )=1
如果3x*x-x=1那么9x*x*x*x+12x*x*x-3x*x-7x+2001等于多少
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
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+3/x+1-x+5/x+3-x+7/x+5+x+9/x+7=0
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
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
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
已知x=9/2 求:[(x^+7x+10)/(x^2+6x+5)]×[(x^3+1)/(x^2