Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie
Hi there,
There is an issue with role permissions that is being worked on at the moment.
If you are having trouble with access or permissions on regional forums please post here to get access: https://www.boards.ie/discussion/2058365403/you-do-not-have-permission-for-that#latest

maths question

  • 12-04-2013 9:39am
    #1
    Scubasteve123
    Registered Users, Registered Users 2 Posts: 8 ✭


    could really use the help..im pritty stuck :L

    find all the possible real numbers a,b for which the function is continous everywhere


    f(x) = {x^3 + ax^2 + 3x + 2, if x < 1
    ... ... {x^3 - 4, if 1 =< x < 2
    ....... {4x^2 + bx + 5, if x >= 2

    i dont know were to start :/


Comments

  • #2
    p1akuw47h5r3it
    Closed Accounts Posts: 3,001 ✭✭✭p1akuw47h5r3it


    Post it in the Maths forum. Go to the science link at the top of your screen. Your more likely to get an answer there


  • #3
    Konata
    Closed Accounts Posts: 6,164 ✭✭✭Konata


    Moved to the Mathematics forum :)


  • #4
    MathsManiac
    Registered Users, Registered Users 2 Posts: 1,595 ✭✭✭MathsManiac


    The first two expressions have to give the same y-value when x=1; this allows you to find a.
    The second and third have to gave the same y-value when x=2; this allows you to find b.

    NB. You need to understand why the above assertions are true. If you can't figure out why, then you don't understand continuity and should go back and check your notes again.


Advertisement