> 数学 >
1
x2−3x+2
+
1
x2−5x+6
+
1
x2−4x+3
人气:168 ℃ 时间:2020-05-19 10:54:47
解答
原式=
1
(x−2)(x−1)
+
1
(x−2)(x−3)
+
1
(x−1)(x−3)

=
x−3+x−1+x−2
(x−1)(x−2)(x−3)

=
x−3+x−1+x−2
(x−1)(x−2)(x−3)

=
3(x−2)
(x−1)(x−2)(x−3)

=
3
(x−1)(x−3)
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