Maths question

Announcements
    • Thread Starter
    Offline

    3
    I thought I was supposed to shift this 2 spaces to the left?
    Question 2Bi
    Attached Images
     
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    I thought I was supposed to shift this 2 spaces to the left?
    Question 2Bi
    you would move it in the y-direction.
    upwards

    In general, if we start with y = f(x), then:-
    y = f(x) + a translates f(x) 'a' units in the y-direction

    if it was y=f(x+a)
    y = f(x + a) translates f(x) '-a' units in the x-direction

    hope that helps
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    you would move it in the y-direction.
    upwards

    In general, if we start with y = f(x), then:-
    y = f(x) + a translates f(x) 'a' units in the y-direction

    if it was y=f(x+a)
    y = f(x + a) translates f(x) '-a' units in the x-direction

    hope that helps

    Did you do anything with the f(x) = (x-1)(x+2) ?

    and thanks for replying x
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    Did you do anything with the f(x) = (x-1)(x+2) ?

    and thanks for replying x
    you would sketch the graph of f(x)=(x-1)(x+2)

    then shift it 2 units upwards

    try looking at this link

    http://www.bbc.co.uk/schools/gcsebit...onhirev1.shtml
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    you would move it in the y-direction.
    upwards

    In general, if we start with y = f(x), then:-
    y = f(x) + a translates f(x) 'a' units in the y-direction

    if it was y=f(x+a)
    y = f(x + a) translates f(x) '-a' units in the x-direction

    hope that helps

    Is this correct:
    y=f(x+2) I translate the curve 2 units to the left?
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    Is this correct:
    y=f(x+2) I translate the curve 2 units to the left?
    yes you would move it to the left.and y=f(x-2) to the right
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    Is this correct:
    y=f(x+2) I translate the curve 2 units to the left?
    [*]f(x) + a is f(x) shifted upward a units[*]f(x) – a is f(x) shifted downward a units[*]f(x + a) is f(x) shifted left a units[*]f(xa) is f(x) shifted right a units
    Hope that helps
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    yes you would move it to the left.and y=f(x-2) to the right
    but why am i moving f=(x+2) upwards in 2bi?
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    but why am i moving f=(x+2) upwards in 2bi?
    2bi you would move to the left

    2bii you would move upwards
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    but why am i moving f=(x+2) upwards in 2bi?
    is this for C1 or for GCSE?
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    2bi you would move to the left

    2bii you would move upwards
    2bi) to -2 n the x axis?
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    is this for C1 or for GCSE?
    c1
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    2bi) to -2 right on the x axis?
    yes shift 2 places to the left

    f(x + a) is f(x) shifted left a units
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    yes shift 2 places to the left

    f(x + a) is f(x) shifted left a units
    Thats exactly what I did but in the textbook its wrong, I think I am supposed to use something
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    c1
    watch this video it should help

    https://www.youtube.com/watch?v=a96TvWBDzpE
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    Thats exactly what I did but in the textbook its wrong, I think I am supposed to use something
    can you show me the textbooks answer
    • Thread Starter
    Offline

    3
    Name:  Untitled.png
Views: 33
Size:  10.2 KB
    (Original post by maruchan)
    watch this video it should help

    https://www.youtube.com/watch?v=a96TvWBDzpE

    the answers:
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    Name:  Untitled.png
Views: 33
Size:  10.2 KB


    the answers:
    the textbook may be wrong just follow the video and the rules and then you should get it. you can check your answer on wolphram alpha
    • Thread Starter
    Offline

    3
    (Original post by maruchan)
    the textbook may be wrong just follow the video and the rules and then you should get it. you can check your answer on wolphram alpha
    I will. I know how to do fx notation with exam solutions but this answer in the textbook doesn't even make sense

    did you get an A/A* in maths a level?
    i'm doing 6 units this year!! tips?
    Offline

    3
    ReputationRep:
    (Original post by samantham999)
    I will. I know how to do fx notation with exam solutions but this answer in the textbook doesn't even make sense

    did you get an A/A* in maths a level?
    i'm doing 6 units this year!! tips?
    The textbook is right.
 
 
 
Write a reply… 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. Oops, you need to agree to our Ts&Cs to register
  2. Slide to join now Processing…

Updated: September 30, 2016
TSR Support Team
Poll
Spring onions - Yay or nay?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

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