M2 Binomial theorem
2010-08-29 6:29 pm
In the expansion of (1+4px) (1+qx)^n, the coefficient of x is zero and the coefficient of x^2 is -40. Find the values of p and q.
回答 (4)
2010-08-30 11:25 am
✔ 最佳答案
There could be numerous answers since there are 3 unknowns and only 2 given conditions. Possible sets are :1. n = 4, q = 2, p = - 2.
2. n = 5, q = sqrt(8/3), p = sqrt(8/3) x (-5/4).
3. n = 10, q = sqrt(8/11), p = sqrt(8/11) x (-5/2)
2010-08-30 03:33:56 補充：
Give you one more set : n = 9, q = (sqrt8)/3, p = (-3/4)sqrt 8.
2010-08-29 9:03 pm
個n係咪應該係數字??
2010-08-29 8:17 pm
應該無打錯題目
應該夠料做.....
但好難... 應該係 pure math, 或 a math
應該夠料做.....
但好難... 應該係 pure math, 或 a math
2010-08-29 7:13 pm
三個 unknown , 兩個條件 請問有否打錯題目
收錄日期: 2021-04-22 00:51:28
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20100829000051KK00333