问题 填空题
化简:(7-5
2
2000•(7+5
2
2001=______.
答案

(7-5

2
2000•(7+5
2
2001

=(7-5

2
2000•(7+5
2
2000•(7+5
2

=[(7-5

2
)•(7+5
2
)]2000•(7+5
2

=(-1)2000•(7+5

2

=7+5

2

故答案为:7+5

2

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