1.(x^2+x)/(x^2-1) 2.(x^2-9)/(x^2-6
来源:学生作业帮 编辑:作业帮 分类:数学作业 时间:2024/07/08 12:11:13
1.(x^2+x)/(x^2-1) 2.(x^2-9)/(x^2-6
1.(x^2+x)/(x^2-1)
2.(x^2-9)/(x^2-6x+9)
3.先化简后求值 x=5.(x^2-8x+16)/(x^2-16)
都是分数来的
1.(x^2+x)/(x^2-1)
2.(x^2-9)/(x^2-6x+9)
3.先化简后求值 x=5.(x^2-8x+16)/(x^2-16)
都是分数来的
1.(x^2+x)/(x^2-1)=x(x+1)/(x-1)(x+1)=x/(x-1)
2.(x^2-9)/(x^2-6x+9)
=(x-3)(x+3)/(x-3)²
=(x+3)/(x-3)
3.(x^2-8x+16)/(x^2-16)
=(x-4)²/(x+4)(x-4)
=(x-4)/(x+4)
=(5-4)/(5+1)
=1/9
2.(x^2-9)/(x^2-6x+9)
=(x-3)(x+3)/(x-3)²
=(x+3)/(x-3)
3.(x^2-8x+16)/(x^2-16)
=(x-4)²/(x+4)(x-4)
=(x-4)/(x+4)
=(5-4)/(5+1)
=1/9
|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
1.通分3x/x+1,2x+6/x,x方-9/x-1
(x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9)
x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
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),
求化简:(x^2+3x+9)/(x^2-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)
化简(x^2+3x+9)/(x^3-27)+(6x)/(9x-x^2)-(x-1)/(6+2x)
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)