题目内容
计算:(1-
)(1-
)…(1-
)(1-
)=______
| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 92 |
| 1 |
| 102 |
(1-
)(1-
)…(1-
)(1-
),
=(1-
)(1+
)(1-
)(1+
)•…•(1-
)(1+
)(1-
)(1+
),
=
×
×
×
×
×
×…×
×
×
×
,
=
×
,
=
.
| 1 |
| 22 |
| 1 |
| 32 |
| 1 |
| 92 |
| 1 |
| 102 |
=(1-
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 9 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 10 |
=
| 1 |
| 2 |
| 3 |
| 2 |
| 2 |
| 3 |
| 4 |
| 3 |
| 3 |
| 4 |
| 5 |
| 4 |
| 8 |
| 9 |
| 10 |
| 9 |
| 9 |
| 10 |
| 11 |
| 10 |
=
| 1 |
| 2 |
| 11 |
| 10 |
=
| 11 |
| 20 |
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