x(x-1)分之1+(x—1)(x-2)分之1+(x-2)(x-3)分之1+(x-3)(x-4)分之1 (x=104)
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x(x-1)分之1+(x—1)(x-2)分之1+(x-2)(x-3)分之1+(x-3)(x-4)分之1 (x=104)
![x(x-1)分之1+(x—1)(x-2)分之1+(x-2)(x-3)分之1+(x-3)(x-4)分之1 (x=104)](/uploads/image/z/19949388-60-8.jpg?t=x%EF%BC%88x-1%EF%BC%89%E5%88%86%E4%B9%8B1%2B%EF%BC%88x%E2%80%941%EF%BC%89%EF%BC%88x-2%EF%BC%89%E5%88%86%E4%B9%8B1%2B%EF%BC%88x-2%EF%BC%89%EF%BC%88x-3%EF%BC%89%E5%88%86%E4%B9%8B1%2B%EF%BC%88x-3%EF%BC%89%EF%BC%88x-4%EF%BC%89%E5%88%86%E4%B9%8B1+%EF%BC%88x%3D104%EF%BC%89)
1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)
=[(x-2)+1]/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)
=1/(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)
=[(x-3)+1]/(x-2)(x-3)+1/(x-3)(x-4)
=1/(x-3)+1/(x-3)(x-4)
=1/(x-4)
=1/(x-4)
带入的 等于1/100 采纳我吧 亲
=[(x-2)+1]/(x-1)(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)
=1/(x-2)+1/(x-2)(x-3)+1/(x-3)(x-4)
=[(x-3)+1]/(x-2)(x-3)+1/(x-3)(x-4)
=1/(x-3)+1/(x-3)(x-4)
=1/(x-4)
=1/(x-4)
带入的 等于1/100 采纳我吧 亲
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