All about
flooble

fun stuff

Get a free chatterbox

Free JavaScript

Avatars
perplexus
dot
info
Home
>
Just Math
So many quintuplets... (
Posted on 20110317
)
Determine the total number of quintuplets (A,B,C,D,E) of positive integers such that A<=B<=C<=D<=E<=N. Both analytic and software solution for N=1, 2, ...9,10,...N required.
Submitted by
Ady TZIDON
Rating:
4.0000
(3 votes)
Solution:
(
Hide
)
My recursive formula for f(n): f(1)=1; f(n)=f(n1)*(f+4)/(n1)
See also excellent presentation and solution by Charlie.
Comments: (
You must be logged in to post comments.
)
Subject
Author
Date
re: solution + spoiler
Ady TZIDON
20110317 18:34:07
Solution
Math Man
20110317 17:32:03
solution
Charlie
20110317 13:31:16
Please log in:
Login:
Password:
Remember me:
Sign up!

Forgot password
Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ

About This Site
Site Statistics
New Comments (2)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On
Chatterbox:
blackjack
flooble's webmaster puzzle
Copyright © 2002  2017 by
Animus Pactum Consulting
. All rights reserved.
Privacy Information