Results are out! Find what you need...fast. Get quick advice or join the chat
Hey! Sign in to get help with your study questionsNew here? Join for free to post

difficult fp3 vectors

Announcements Posted on
Will you get the grades you need for uni? Get prepared today and de-stress, sign up to email alerts for course places! 02-06-2015
Waiting on IB results? Our IB results hub explains everything you need to know 01-06-2015
  1. Offline

    ReputationRep:
    can anyone help me out with 6d and 7c http://www.edexcel.com/migrationdocu...e_20100628.pdf

    im not sure how to turn the cartesian into vector equation and no idea how to work out perpendicular distance :O

    thanks
  2. Offline

    ReputationRep:
    Probably not the method they have in mind but, you can easily find two points on l1.

    Apply the transformation to get two points on l2.

    Write down the equation of l2 in vector form and convert to cartesian equations.
  3. Offline

    ReputationRep:
    If you want to change \frac{x-a}{b}=\frac{x-c}{d}=\frac{z-e}{f} to a vector equation set them all equal to t.

    \frac{x-a}{b}=t\Rightarrow x=a+bt

    \frac{y-c}{d}=t\Rightarrow y=c+dt

    \frac{z-e}{f}=t\Rightarrow z=e+ft
  4. Offline

    ReputationRep:
    (Original post by BabyMaths)
    If you want to change \frac{x-a}{b}=\frac{x-c}{d}=\frac{z-e}{f} to a vector equation set them all equal to t.

    \frac{x-a}{b}=t\Rightarrow x=a+bt

    \frac{y-c}{d}=t\Rightarrow y=c+dt

    \frac{z-e}{f}=t\Rightarrow z=e+ft
    so those equations for x,y and z are the vector coordinates?
  5. Offline

    ReputationRep:
    (Original post by number23)
    so those equations for x,y and z are the vector coordinates?
    How can equations be coordinates?

    To make it clearer..

    \begin{pmatrix}x \\ y\\ z \end{pmatrix}= \begin{pmatrix}a \\ c\\e \end{pmatrix}+ t \begin{pmatrix}b \\ d \\ f \end{pmatrix}
  6. Offline

    ReputationRep:
    (Original post by BabyMaths)
    How can equations be coordinates?

    To make it clearer..

    \begin{pmatrix}x \\ y\\ z \end{pmatrix}= \begin{pmatrix}a \\ c\\e \end{pmatrix}+ t \begin{pmatrix}b \\ d \\ f \end{pmatrix}
    yeah this us what i meant.. the x coordinate of a point in the line is given by an equation and so forth

    thanks for the help
  7. Offline

    ReputationRep:
    (Original post by BabyMaths)
    Probably not the method they have in mind but, you can easily find two points on l1.

    Apply the transformation to get two points on l2.

    Write down the equation of l2 in vector form and convert to cartesian equations.
    (Original post by BabyMaths)
    If you want to change \frac{x-a}{b}=\frac{x-c}{d}=\frac{z-e}{f} to a vector equation set them all equal to t.

    \frac{x-a}{b}=t\Rightarrow x=a+bt

    \frac{y-c}{d}=t\Rightarrow y=c+dt

    \frac{z-e}{f}=t\Rightarrow z=e+ft
    thanks, also once youve got these equations for x, y etc. how do you find the vector equation for the line?

    also, could anyone help me with this one:

    the cartersian equation of a line is:  (x-x_1)/l=(y-y_1)/m=(z-z_1)/ n=lambda

    my book says the line has direction ratios l : m : n ... what does this mean? thanks

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: June 14, 2012
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

New on TSR

Improving your uni offer

Why now is the time to think about Adjustment

Study resources
x

Think you'll be in clearing or adjustment?

Hear direct from unis that want to talk to you

Get email alerts for university course places that match your subjects and grades. Just let us know what you're studying.

Quick reply
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.