题目内容
观察下列分母有理化的计算:
=
-
=
-
=
-
=
-
…从计算结果中找出规律,并利用这一规律计算:(
+
+
+…+
)(
+1)=______.
| 1 | ||||
|
| 2 |
| 1 |
| 1 | ||||
|
| 3 |
| 2 |
| 1 | ||||
|
| 4 |
| 3 |
| 1 | ||||
|
| 5 |
| 4 |
…从计算结果中找出规律,并利用这一规律计算:(
| 1 | ||||
|
| 1 | ||||
|
| 1 | ||||
|
| 1 | ||||
|
)(
| 2002 |
原式=(
-1+
-
+
-
+…+
-
)(
+1)
=(
-1)(
+1)
=2002-1
=2001.
| 2 |
| 3 |
| 2 |
| 4 |
| 3 |
| 2002 |
| 2001 |
| 2002 |
=(
| 2002 |
| 2002 |
=2002-1
=2001.
练习册系列答案
相关题目