拆(添)项法,x^3-7x^2+6和x^3-9x^2+26x
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拆(添)项法,x^3-7x^2+6和x^3-9x^2+26x
第二个是x^3-9x^2+26x+24,
第二个是x^3-9x^2+26x+24,
![拆(添)项法,x^3-7x^2+6和x^3-9x^2+26x](/uploads/image/z/19697338-10-8.jpg?t=%E6%8B%86%EF%BC%88%E6%B7%BB%EF%BC%89%E9%A1%B9%E6%B3%95%2Cx%5E3-7x%5E2%2B6%E5%92%8Cx%5E3-9x%5E2%2B26x)
x^3-7x^2+6=x^3-x^2--6x^2+6=(x^3-x^2)-(6x^2-6)
=x^2(x-1)-6(x+1)(x-1)=(x-1)(x^2-6x-6)
=x^2(x-1)-6(x+1)(x-1)=(x-1)(x^2-6x-6)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
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),
解方程:(x-8)/(x-3)-(x-9)/(x-4)=(x+7)/(x+8)-(x+2)/(x+3)
解方程:(x+3)/(x+2)-(x+5)/(x+4)=(x+7)/(x+6)-(x+9)/(x+8)
解方程(x-2)X(x的平方-6x-9)=x(x-5)X(x-3)
2x+3x+4x+5x+x+6x+7x=100
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9
(x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9)