
Advanced Statistics Advanced Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
May 25th, 2009, 10:05 AM  #1 
Newbie Joined: May 2009 Posts: 1 Thanks: 0  Vector question. What am I doing wrong?
Here I have a supposedly simple vector question but my answers contradict themselves. What am I doing wrong? A(1,3,2) u= i + 3j +k v= 3jk a) If vector AB = u  v what are coordinates of B AB = OB  OA OB = (u v) + OA OB = (2,3,4) b)i) Write down the parametric equation of the line L, passing thorugh the point A in the direction of AB. L = OA + m(AB) L = (1,3,2) m(1,0,2) ii) What is the value of m at which L cross the YZ plane. L crosses the YZ plane when x= 0 (0,y,z) = (1,3,2) + m(1,0,2) 0 = 1 + m y = 3 z= 2 + 2m My problem here is that the z turns out to be zero. This is not possible since it says it crosses the YZ plane. 

Tags 
question, vector, wrong 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Simple probability question, where am I going wrong?  pcompany  Probability and Statistics  8  September 30th, 2013 10:37 PM 
Is there something wrong with this question?  perfect_world  Algebra  5  September 2nd, 2013 05:26 AM 
Rhombus question (is the book wrong?)  sharp  Algebra  2  December 14th, 2010 05:13 PM 
Simple Integration question: what am I doing wrong here.  Insertnamehere  Calculus  4  September 6th, 2009 09:14 PM 
Simple probability question, how can I possibly be wrong?  Majestic_Q  Algebra  1  December 4th, 2008 03:49 PM 