A Maths Question (2)
2008-08-21 4:22 am
When (x2+a/x)n is expanded in descending powers of x, where n is a positive integer and a>0, the fifth term is independent of x and is equal to 240. Find the values of n and a.
回答 (1)
2008-08-21 4:40 am
收錄日期: 2021-04-22 00:39:16
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