Turn on thread page Beta
    • Thread Starter
    Offline

    9
    ReputationRep:
    Q1. a) f(x)= x^2 -4x +k where 1<k<3. What are the coordinates of points where the curve cuts the y-axis and the coordinates of the turning point?

    b) The equation f(x)= -2 has two distinct solutions. Find range of values for k


    Q2. f(x) = 2x^2 -5x +k for k>4
    What are coordinates of points where graph cuts axes and coordinate of turning point
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by Sneedshelp)
    Q1. a) f(x)= x^2 -4x +k where 1<k<3. What are the coordinates of points where the curve cuts the y-axis and the coordinates of the turning point?

    b) The equation f(x)= -2 has two distinct solutions. Find range of values for k


    Q2. f(x) = 2x^2 -5x +k for k>4
    What are coordinates of points where graph cuts axes and coordinate of turning point
    Please post your working and show us where you're stuck. Also, please always post maths questions in the maths forum so they are answered faster. I've moved this thread for you.
    • Thread Starter
    Offline

    9
    ReputationRep:
    I cannot actually do the questions
    • Community Assistant
    Offline

    20
    ReputationRep:
    Community Assistant
    (Original post by Sneedshelp)
    I cannot actually do the questions
    Q1 a

    What do you know about the x-coordinate when the curve cuts the y-axis?
    So, plug that one into your f and you get your y-axis cut.
    Coordinates of the turning point, look in your notes about it. You need to complete the square on it, then read off the info directly.

    k is just some constant between 1 and 3, so treat it as a constant. Shouldn't be too confusing here.

    Get it?
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: November 8, 2017

1,256

students online now

800,000+

Exam discussions

Find your exam discussion here

Poll
Should predicted grades be removed from the uni application process
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

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