25. solve the equation n nC 2 = (n-1)(n+3/2) where n is a positive integer.
29. simplify ﹝(n-1)! (2n)!﹞/ 2(n!)(2n-2)!
更新1:
25. solve the equation n*nC2 = (n-1)(n+3/2) where n is a positive integer.
the pascal's triangle
2008-10-08 5:55 am
8. expand (2+x)^5 (2-x)^5 in ascending powers of x .
25. solve the equation n nC 2 = (n-1)(n+3/2) where n is a positive integer.
29. simplify ﹝(n-1)! (2n)!﹞/ 2(n!)(2n-2)!
25. solve the equation n nC 2 = (n-1)(n+3/2) where n is a positive integer.
29. simplify ﹝(n-1)! (2n)!﹞/ 2(n!)(2n-2)!
回答 (1)
2008-10-08 10:56 am
✔ 最佳答案
The answer is as follows:圖片參考：http://i277.photobucket.com/albums/kk75/uncle_michael/20081008_mat_1.jpg?t=1223405740
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