(1-2-132)-1(1-2-116)(1+2-116)(1+2-18)(1+2-14)(1+2-12)=(  )A.12(1-2-132)-1B.12(1-...

2023-06-05 23:19发布

这道初中数学的题目是:
(1-2-
1
32
-1(1-2-
1
16
)(1+2-
1
16
)(1+2-
1
8
)(1+2-
1
4
)(1+2-
1
2
)=(  )
A.
1
2
(1-2-
1
32
-1
B.
1
2
(1-2-
1
32
C.
1
2
D.(1-2-
1
32
-1
1条回答
狙击手
2023-06-05 23:28
这道初中数学题的正确答案为:
原式=(1-2-
1
32
-1[(1-2-
1
16
)(1+2-
1
16
)](1+2-
1
8
)(1+2-
1
4
)(1+2-
1
2

=(1-2-
1
32
-1(1-2-
1
8
)(1+2-
1
8
)(1+2-
1
4
)(1+2-
1
2

=(1-2-
1
32
-1(1-2-
1
4
)(1+2-
1
4
)(1+2-
1
2

=(1-2-
1
32
-1(1-2-
1
2
)(1+2-
1
2

=(1-2-
1
32
-1(1-2-1
=
1
2
(1-2-
1
32
-1
故选A.
解题思路 132

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