Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    7
    ReputationRep:
    how do you find the coordinate of the stationary points of y=2x+3 / 8/x ?
    Offline

    9
    ReputationRep:
    (Original post by unicorngirl15)
    how do you find the coordinate of the stationary points of y=2x+3 / 8/x ?
    What have you tried to do so far? What do you normally do to find a turning point/stationary point? xx
    Offline

    9
    ReputationRep:
    When a point is stationary, its gradient is going to equal zero.
    Therefore to find the x coordinate, you need to find the derivative (dy/dx) of the equation, set it equal to zero, then solve.
    After that, sub the x back into the equation to get the y.

    If you have any other questions just ask
    • Thread Starter
    Offline

    7
    ReputationRep:
    (Original post by AnnaBanana2000)
    What have you tried to do so far? What do you normally do to find a turning point/stationary point? xx
    i diffrentiated 8/x to get -8x to the power of -2. But i am not sure what to do next ?
    Offline

    9
    ReputationRep:
    (Original post by unicorngirl15)
    i diffrentiated 8/x to get -8x to the power of -2. But i am not sure what to do next ?
    Ok, well stationary points are when the gradient is equal to 0. You’ve just worked out the gradient function, so how do you think we can get x? xx
    • Thread Starter
    Offline

    7
    ReputationRep:
    (Original post by AnnaBanana2000)
    Ok, well stationary points are when the gradient is equal to 0. You’ve just worked out the gradient function, so how do you think we can get x? xx
    Is it y=2* (-8x)to the power of -2 ?
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
    Useful resources

    Study tools

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Thinking about uni already?

    Thinking about uni already?

    See where you can apply with our uni match tool

    Student chat

    Ask a question

    Chat to other GCSE students and get your study questions answered.

    Creating

    Make study resources

    Create all the resources you need to get the grades.

    Planner

    Create your own Study Plan

    Organise all your homework and exams so you never miss another deadline.

    Resources by subject

    From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

    Papers

    Find past papers

    100s of GCSE past papers for all your subjects at your fingertips.

    Help out other students

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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.