Mathematics
Junior High
どうして1番目の式から2番目の式になるのですか?例・・・(1-1/2²)=(1-1/2)(1+1/2)
×
( * + 1 ) ( * * − 1 ) x x ( 1 + 1 ) (-1)x
1
992
=(1/2)(1+1/2)(1-1/8)(1+1/3)(1-1)(1+1)
5,
(1
3
3
.....
5
9
6
=1/2x/x/x/xx/xx/
4
XX
×
98
97
×
98
99
×
5
99
98
×
99
99
100
-66-1)x
...... ☑
52
42
-10 (−1) (*−1)(−1)(−1) 8 H
(0-P)-(-9)-66
100 50
99
=
=1/2x
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