题目内容
找规律,并计算
(1)
+
+
+
+
+ = ;
(2)
+
+
+
+
+ + = .
(1)
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
(2)
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
考点:“式”的规律
专题:探索数的规律
分析:后一个数是前一个数的
,据此解答即可.
| 1 |
| 2 |
解答:
解:(1)
+
+
+
+
+
=
×(32+16+8+4+2)
=
×62
=
;
(2)
+
+
+
+
+
+
=
×(64+32+16+8+4+2)
=
×126
=
.
故答案为:
,
,
,
,
.
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
| 1 |
| 64 |
=
| 1 |
| 64 |
=
| 1 |
| 64 |
=
| 31 |
| 32 |
(2)
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 8 |
| 1 |
| 16 |
| 1 |
| 32 |
| 1 |
| 64 |
| 1 |
| 128 |
=
| 1 |
| 128 |
=
| 1 |
| 128 |
=
| 63 |
| 64 |
故答案为:
| 1 |
| 64 |
| 31 |
| 32 |
| 1 |
| 64 |
| 1 |
| 128 |
| 63 |
| 64 |
点评:本题考查找规律中的数字变化问题,先根据所给数列得出规律:后一个数是前一个数的
,再利用规律解题.
| 1 |
| 2 |
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