My Math Forum  

Go Back   My Math Forum > High School Math Forum > Elementary Math

Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion


Reply
 
LinkBack Thread Tools Display Modes
January 30th, 2018, 04:33 AM   #1
Newbie
 
Joined: Dec 2014
From: UK

Posts: 11
Thanks: 0

Vector Triangle

Hi all

Can someone explain the answer to the attached problem please?

Regards

Jim
Attached Images
File Type: jpg question 25.jpg (81.2 KB, 32 views)
Jimbo77 is offline  
 
January 30th, 2018, 04:38 AM   #2
Senior Member
 
Joined: Oct 2009

Posts: 559
Thanks: 179

Take $A$ to be the origin.
Can you express B and C in terms of a and b?
Can you then express M and N in terms of a and b?
Micrm@ss is offline  
January 30th, 2018, 04:54 AM   #3
Newbie
 
Joined: Dec 2014
From: UK

Posts: 11
Thanks: 0

I do apologise but you have lost me. Can you be a bit more detailed in your questions please? I do want to worked it out for myself and do appreciate you are trying to point me in the right direction!
Jimbo77 is offline  
January 30th, 2018, 08:25 AM   #4
Senior Member
 
Joined: Oct 2009

Posts: 559
Thanks: 179

If AC = 2a, then what is AM?


What is the equation of points on the line BC in terms of AC and AB?
Micrm@ss is offline  
February 3rd, 2018, 10:47 PM   #5
Newbie
 
Joined: Dec 2014
From: UK

Posts: 11
Thanks: 0

AM = a

-3b-2a

Is that correct?
Jimbo77 is offline  
February 4th, 2018, 07:59 AM   #6
Global Moderator
 
Joined: Dec 2006

Posts: 19,724
Thanks: 1807

$\vec{CB} = \vec{AB} - \vec{AC} = 3\textbf{b} - 2\textbf{a}$

Express $\vec{CN}$ as a fraction of $\vec{CB}$.

$\vec{MN} = \vec{MC} + \vec{CN} = \textbf{a } +$ . . .
skipjack is offline  
Reply

  My Math Forum > High School Math Forum > Elementary Math

Tags
triangle, vector



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Vector surface integral for triangle kejinatsu Calculus 3 January 11th, 2017 08:43 AM
vector as product of matrices, exp function of vector whitegreen Linear Algebra 1 June 9th, 2015 06:11 AM
Vector Calculus Divergence of a Vector Field MasterOfDisaster Calculus 2 September 26th, 2011 09:17 AM
Spherical Vector to Cartesian Vector tsa256 Algebra 3 August 20th, 2010 07:33 AM
Complex Number (vector triangle properties) grandia3 Algebra 2 February 21st, 2009 07:55 PM





Copyright © 2018 My Math Forum. All rights reserved.