计算:(x-2)(x-3)分之一减(x-1)(x-3)分之二加(x-1)(x-2)分之一

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计算:(x-2)(x-3)分之一减(x-1)(x-3)分之二加(x-1)(x-2)分之一
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计算:(x-2)(x-3)分之一减(x-1)(x-3)分之二加(x-1)(x-2)分之一
计算:(x-2)(x-3)分之一减(x-1)(x-3)分之二加(x-1)(x-2)分之一

计算:(x-2)(x-3)分之一减(x-1)(x-3)分之二加(x-1)(x-2)分之一

=1/(x-3)-1/(x-2)-2/(x-3)+2/(x-1)+1/(x-2)-1/(x-1)
=1/(x-1)-1/(x-3)
=2/(x-1)(x-3)

(x-2)(x-3)分之一减(x-1)(x-3)分之二加(x-1)(x-2)分之一
=1/(x-2)-1/(x-3)-1/(x-1)+1/(x-3)+1/(x-1)-1/(x-2)
=0

1/(x-2)(x-3)-2/(x-1)(x-3)+1/(x-1)(x-2)
=(x-1)/(x-1)(x-2)(x-3)-2(x-2)/(x-1)(x-2)(x-3)+(x-3)/(x-1)(x-2)(x-3)
=(x-1-2x+4+x-3)/(x-1)(x-2)(x-3)
=0

0