Join TSR now and get all your revision questions answeredSign up now

f(x)=x squared Watch

    • Thread Starter
    Offline

    1
    ReputationRep:
    given that f(x)=x squared sketch these graphs, each on a seprate diagram, and find an expression, giving Y in terms of X, for each function.

    a: y=f(x)-1
    b: y=f(x+1)
    c: y=f(2x)
    d: y=-3f(x)

    i no how to draw these graphs out but i do not get what it means by find the expression giving y in terms of x?

    can any one please explain this
    Offline

    0
    ReputationRep:
    y=f(x)-1
    f(x)=x^2
    y=x^2-1
    and etc
    Offline

    3
    ReputationRep:
    We know that f(x)=x^2. Then y=f(x+1) \Rightarrow y=(x+1)^2 etc.
    Offline

    0
    ReputationRep:
    In these relations you just put the x square instead of f(x) and you find the expression of y in terms of x.
    Offline

    2
    ReputationRep:
    (Original post by sahil112)
    given that f(x)=x squared sketch these graphs, each on a seprate diagram, and find an expression, giving Y in terms of X, for each function.

    a: y=f(x)-1
    b: y=f(x+1)
    c: y=f(2x)
    d: y=-3f(x)

    i no how to draw these graphs out but i do not get what it means by find the expression giving y in terms of x?

    can any one please explain this
    They want to know the equations of the 4 graphs that you have drawn.
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Maths Buster)
    They want to know the equations of the 4 graphs that you have drawn.
    havnt they already given it?
    Offline

    2
    ReputationRep:
    (Original post by sahil112)
    havnt they already given it?
    They want the equations to involve x, not f. And so your 1st equation would be y = x^2; your 2nd equation would be y = [x + 1]^2. And so on.
    • Thread Starter
    Offline

    1
    ReputationRep:
    (Original post by Maths Buster)
    They want the equations to involve x, not f. And so your 1st equation would be y = x^2; your 2nd equation would be y = [x + 1]^2. And so on.
    ah ok thanks for your help
 
 
 
Poll
What is your favourite film genre?
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

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.