问题 解答题
观察下列等式:
1
2
+1
=
2
-1
(
2
+1)(
2
-1)
=
2
-1

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

1
4
+
3
=
4
-
3
(
4
+
3
)(
4
-
3
)
=
4
-
3


回答下列问题:
(1)利用你观察到的规律,化简:
1
23
+
22

(2)计算:
1
2
+1
+
1
3
+
2
+…+
1
2014
+
2013
答案

(1)原式=

23
-
22
(
23
+
22
)(
23
-
22
)

=

23
-
22

(2)原式=

2
-1+
3
-
2
+…+
2014
-
2013

=

2014
-1.

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