# S.O.S. Mathematics CyberBoard

Your Resource for mathematics help on the web!
 It is currently Sat, 25 May 2013 01:02:38 UTC

 All times are UTC [ DST ]

 Page 1 of 1 [ 4 posts ]
 Print view Previous topic | Next topic
Author Message
 Post subject: Binomial expansionsPosted: Mon, 13 Sep 2010 02:46:50 UTC

Joined: Mon, 13 Sep 2010 02:43:18 UTC
Posts: 9
Location: Malaysia
If the coefficients of x^k and x^(k+1) in the expansion of (2+3x)^19 are equal, find k.

Top

 Post subject: Re: Binomial expansionsPosted: Mon, 13 Sep 2010 03:07:18 UTC
 Member of the 'S.O.S. Math' Hall of Fame

Joined: Mon, 10 Jan 2005 18:23:46 UTC
Posts: 3278
Location: baltimore, md
IloveManUtd wrote:
If the coefficients of x^k and x^(k+1) in the expansion of (2+3x)^19 are equal, find k.

_________________
"Those things that hurt, instruct."
-- Ben Franklin

Top

 Post subject: Re: Binomial expansionsPosted: Mon, 13 Sep 2010 03:10:46 UTC

Joined: Mon, 13 Sep 2010 02:43:18 UTC
Posts: 9
Location: Malaysia
robbwrr wrote:

Can you please explain what how do I make k! and (19-k)! more meaningful? Thx!

Top

 Post subject: Re: Binomial expansionsPosted: Mon, 13 Sep 2010 14:49:07 UTC
 Moderator

Joined: Mon, 29 Dec 2008 17:49:32 UTC
Posts: 6009
Location: 127.0.0.1, ::1 (avatar courtesy of UDN)
IloveManUtd wrote:
robbwrr wrote:

Can you please explain what how do I make k! and (19-k)! more meaningful? Thx!

Cancel common factors.

_________________

Top

 Display posts from previous: All posts1 day7 days2 weeks1 month3 months6 months1 year Sort by AuthorPost timeSubject AscendingDescending
 Page 1 of 1 [ 4 posts ]

 All times are UTC [ DST ]

#### Who is online

Users browsing this forum: No registered users

 You cannot post new topics in this forumYou cannot reply to topics in this forumYou cannot edit your posts in this forumYou cannot delete your posts in this forum

Search for:
 Jump to:  Select a forum ------------------ High School and College Mathematics    Algebra    Geometry and Trigonometry    Calculus    Matrix Algebra    Differential Equations    Probability and Statistics    Proposed Problems Applications    Physics, Chemistry, Engineering, etc.    Computer Science    Math for Business and Economics Advanced Mathematics    Foundations    Algebra and Number Theory    Analysis and Topology    Applied Mathematics    Other Topics in Advanced Mathematics Other Topics    Administrator Announcements    Comments and Suggestions for S.O.S. Math    Posting Math Formulas with LaTeX    Miscellaneous