Site Feed

	Math Help Forum > University Math Help > Differential Equations which root to take? User Name Save? Password Register Forum Rules FAQ Donate Members List Arcade Download MHF Flyer Search Today's Posts Mark Forums Read   Thread Tools Display Modes   #1   October 5th, 2009, 04:19 PM pete82 Newbie   Join Date: Oct 2009 Posts: 3 Country: Thanks: 0 Thanked 0 Times in 0 Posts which root to take? when you solve a diff q's and you get y=+- square root, how do you know which square root to take? Advertisement     #2   October 6th, 2009, 07:45 AM Danny MHF Contributor   Join Date: Dec 2008 Location: Conway AR Posts: 1,631 Country: Thanks: 50 Thanked 727 Times in 676 Posts Quote: Originally Posted by pete82 when you solve a diff q's and you get y=+- square root, how do you know which square root to take? If you have an initial condition sometimes that dictates it. Otherwise, you keep both. « Xn Solving a difference equation | Top | Can any one solve this diff eqn? » Thread Tools Show Printable Version Email this Page Display Modes Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is Off Trackbacks are Off Pingbacks are Off Refbacks are Off Forum Jump User Control Panel Private Messages Subscriptions Who's Online Search Forums Forums Home Pre-University Math Help     Pre-Algebra and Algebra     Geometry     Trigonometry     Pre-Calculus     Basic Statistics and Probability     Other topics University Math Help     Calculus     Analysis, Topology and Differential Geometry     Linear and Abstract Algebra     Number theory     Discrete Mathematics, Set Theory and Logic     Advanced Probability and Statistics     Advanced Applied Math     Differential Equations     Business Math     Other Advanced Topics Math Resources     LaTex Help     Mathematics Software Discussion     Calculator Discussion     Useful Math Websites     Mathematics News MHF Lounge     Chat Room         Live Chat         Philosophy             Archive of old debates     Problem of the Week     Pre-prints and other original work Challenges and Puzzles     Puzzles     Math Challenge Problems MHF Feedback and Announcements Forum     Question, Feedback and Comments     Announcements Our Other "Help Forums"     Physics Help Forum     Chemistry Help Forum All times are GMT -7. The time now is 10:51 PM. Contact Us - Math Help - Archive - Top Powered by vBulletin® Version 3.7.3 Copyright ©2000 - 2010, Jelsoft Enterprises Ltd. SEO by vBSEO 3.2.0 ©2008, Crawlability, Inc. ©2005 - 2009 Math Help Forum

Math Help Forum is a community of maths forums with an emphasis on maths help in all levels of mathematics.
Register to post your math questions or just hang out and try some of our math games or visit the arcade.