Turn on thread page Beta
    • Thread Starter

    (Original post by Noble.)
    Ok, I will tell you the answer - not that it's going to help you.

    For the circle to 'touch' each axis we must have that the centre point of the circle is of the form (a,b) where a=b

    Since we also have that (a,b) lies on the line y=3x-4 we must have b=3a-4 but we also know that a=b, so a = 3a -4 gives the centre of the circle being (2,2) now the radius is also obvious.
    hi nobel, I am having bother understanding the equation of a circle

    x^2 + y^2 + 2gx + 2fy + c = 0

    what are f g and c?
Do you want your parents to be with you when you collect your A-level results?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


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