问题 解答题
计算下列各式:(式中字母都是正数)
(1)
2+
4
3
3
1+
4-2
3

(2)
m+1
m
2
3
-m
1
3
+1
答案

(1)原式=

2+
4
3
3
1+
(
3
-1)2

=

2+
4
3
3
3

=

2
3
+4

=

(
3
+1)2

=

3
+1.

(2)原式=

(m+1)(m
1
3
+1)
(m
1
3
+1)(m
2
3
-m
1
3
+1)

=

(m+1)(m
1
3
+1)
m+1

=m

1
3
+1.

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