作业帮计算(3-x)/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
来源：学生作业帮 编辑：拍题作业网作业帮 分类：数学作业 时间：2024/04/27 14:27:06
计算(3-x)/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
(3-x)/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
(1-x+2)/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
1+2/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
2/(1-x)+(x^2-2)/(x^2-8x+7)=(5-x)/(7-x)
2/(1-x)+(x^2-2)/(x^2-8x+7)-(5-x)/(7-x)=0
-2/(x-1)+(x^2-2)/(x^2-8x+7)-(x-5)/(x-7)=0
(x^2-2)/(x^2-8x+7)-2/(x-1)-(x-5)/(x-7)=0
(x^2-2)/(x-7)(x-1)-2(x-7)/(x-7)(x-1)-(x-5)(x-1)/(x-1)(x-7)=0
[(x^2-2)-2(x-7)-(x-5)(x-1)]/(x-1)(x-7)=0
[x^2-2-2x+14-(x^2-6x+5)]/(x-1)(x-7)=0
[x^2-2-2x+14-x^2+6x-5)/(x-1)(x-7)=0
(4x+7)/(x-1)(x-7)=0
4x+7=0
x=-7/4
经检验x=-7/4是方程的解
(1-x+2)/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
1+2/(1-x)+(x^2-2)/(x^2-8x+7)=1+(5-x)/(7-x)
2/(1-x)+(x^2-2)/(x^2-8x+7)=(5-x)/(7-x)
2/(1-x)+(x^2-2)/(x^2-8x+7)-(5-x)/(7-x)=0
-2/(x-1)+(x^2-2)/(x^2-8x+7)-(x-5)/(x-7)=0
(x^2-2)/(x^2-8x+7)-2/(x-1)-(x-5)/(x-7)=0
(x^2-2)/(x-7)(x-1)-2(x-7)/(x-7)(x-1)-(x-5)(x-1)/(x-1)(x-7)=0
[(x^2-2)-2(x-7)-(x-5)(x-1)]/(x-1)(x-7)=0
[x^2-2-2x+14-(x^2-6x+5)]/(x-1)(x-7)=0
[x^2-2-2x+14-x^2+6x-5)/(x-1)(x-7)=0
(4x+7)/(x-1)(x-7)=0
4x+7=0
x=-7/4
经检验x=-7/4是方程的解
|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
已知x=根号2-1,计算x^10+2x^9-2x^8-2x^7+x^6+3x^2+5x+1的值
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
a*b=2×a+b 计算x*2x*3x*4x*5x*6x*7x*8x*9x=3039 x=