(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=
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(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=
SORRY打错了
(3x^2+9x+7)/(x-1)-(2x^2+4x-3)/(x+1)-(x^3+x+1)/(x^2-1)=
SORRY打错了
(3x^2+9x+7)/(x-1)-(2x^2+4x-3)/(x+1)-(x^3+x+1)/(x^2-1)=
=(3x^2+9x+7)(x+1)/(x^2-1)-(2x^2+4x-3)(x-1)/(x^2-1)-(x^3+x+1)/(x^2-1)
=(3x^3+12x^2+16x+7)/(x^2-1)-(2x^3+2x^2-7x+3)/(x^2-1)-(x^3+x+1)/(x^2-1)
=(10x^2+22x+3)/(x^2-1)
=(3x^3+12x^2+16x+7)/(x^2-1)-(2x^3+2x^2-7x+3)/(x^2-1)-(x^3+x+1)/(x^2-1)
=(10x^2+22x+3)/(x^2-1)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
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),
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值
x+2/x+3-x+1/x+2=x+8/x+9-x+7/x+8