This is an archived, read-only copy of the United-TI subforum , including posts and topic from May 2003 to April 2012. If you would like to discuss any of the topics in this forum, you can visit Cemetech's
TI-BASIC subforum. Some of these topics may also be directly-linked to active Cemetech topics. If you are a Cemetech member with a linked United-TI account, you can link United-TI topics here with your current Cemetech topics.
TI-Basic Brain Teasers =>
TI-BASIC
| Author |
Message |
|
stranger
Advanced Newbie
Joined: 23 Jan 2008
Posts: 63
|
 Posted: 06 Mar 2008 06:46:27 pm Post subject: |
|
|
OK, here it is:
For the standard form of a quadratic equation, find where X1 and X2 are values whose Y-coefficients are equal and X1 is A greater than X2. In other words, make a program that will find the horizontal line that crosses a parabola at two points, which are A units apart.
Good luck, this one flattened me. |
|
| Back to top |
|
|
DarkerLine
ceci n'est pas une |
Super Elite (Last Title)
Joined: 04 Nov 2003
Posts: 8328
|
| Posted: 06 Mar 2008 06:53:58 pm Post subject: |
|
|
| This is more of a math problem than a programming problem, isn't it? When y=ax^2+bx+c, you know the vertex is at -b/2a, so all you have to do is and and subtract half of A from this value. |
|
| Back to top |
|
|
stranger
Advanced Newbie
Joined: 23 Jan 2008
Posts: 63
|
| Posted: 07 Mar 2008 06:39:54 pm Post subject: |
|
|
| oops, sorry, I meant the reciprocal of A. What I was thinking was, the larger A is, the wider the parabola, so there must be two points that are always the same distance from the vertex that will show, if you were viewing the line without knowing the equation, the value of A. Or at least A^-1. |
|
| Back to top |
|
|
|
Register to Join the Conversation
Have your own thoughts to add to this or any other topic? Want to ask a question, offer a suggestion, share your own programs and projects, upload a file to the file archives, get help with calculator and computer programming, or simply chat with like-minded coders and tech and calculator enthusiasts via the site-wide AJAX SAX widget? Registration for a free Cemetech account only takes a minute.
»
Go to Registration page
