(3-x)/(1-x)-(5-x)/(7-x)=1-(x^2-2)/(x^2-8x+7)
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(3-x)/(1-x)-(5-x)/(7-x)=1-(x^2-2)/(x^2-8x+7)
我没算出来
我没算出来
![(3-x)/(1-x)-(5-x)/(7-x)=1-(x^2-2)/(x^2-8x+7)](/uploads/image/z/19033931-11-1.jpg?t=%283-x%29%2F%281-x%29-%285-x%29%2F%287-x%29%3D1-%28x%5E2-2%29%2F%28x%5E2-8x%2B7%29)
(x-3)/(x-1)-(x-5)/(x-7)=(x^2-8x+7-x^2+2)/(x-1)(x-7)
两边乘(x-1)(x-7)
x^2-10x+21-x^2+6x-5=-5x+9
-4x+16=-5x+9
x=-7
分式方程要检验
经检验x=-7是方程的根
两边乘(x-1)(x-7)
x^2-10x+21-x^2+6x-5=-5x+9
-4x+16=-5x+9
x=-7
分式方程要检验
经检验x=-7是方程的根
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
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
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),
(3-x)/(1-x)-(5-x)/(7-x)+(x^2-x)/(x^2-8x+7)=1
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
(X+2)/(X+1)-(X+4)/(X+3)=(X+6)/(X+5)-(X+8)/(X+7)
解方程 x+2/x+1+x+8/x+7=x+6/x+5+x+4/x+3
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
已知x=2π+1求 |x-1|+|x-2|+|x-3|+|x-4|+|x-5|+|x-6|+|x-7|+|x-8|+|x
1x()+2x()+3x()+4x()+5x()+6x()+7x()+8x()加9x()+10x()=1980