Evaluate the following sum using a combinatorial argument: Sum of n when k=0 (n choose k)(m choose k)?
回答 (2)
2016-02-21 2:53 am
Can't understand your notation.
Sum from k = 0 to...? What's the upper limit?
What do you mean by sum of n? Are the limits in terms of k or n?
Can you rewrite this as
sum from (k = 1) to ___ of (some expression)?
Sum from k = 0 to...? What's the upper limit?
What do you mean by sum of n? Are the limits in terms of k or n?
Can you rewrite this as
sum from (k = 1) to ___ of (some expression)?
2016-02-21 2:48 am
dag
收錄日期: 2021-04-21 17:00:43
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20160220184806AA2Wmtc