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

    8
    ReputationRep:
    Howdy .

    What is it called when a variable is in between two lines.

    For example: |x|

    Also, what does it mean?

    Thanks
    • Community Assistant
    • Political Ambassador
    • Clearing and Applications Advisor
    Offline

    21
    Absolute value of x

    Value in between the |...| is always positive

    E.g. |-3|= 3

    Posted from TSR Mobile
    • Community Assistant
    Offline

    15
    ReputationRep:
    (Original post by makin)
    Howdy .

    What is it called when a variable is in between two lines.

    For example: |x|

    Also, what does it mean?

    Thanks
    It's the modulus function. It gives the absolute value of a function (if x>0 |x|=x, if x<0 |x|=-x)
    Offline

    1
    ReputationRep:
    (Original post by makin)
    Howdy .

    What is it called when a variable is in between two lines.

    For example: |x|

    Also, what does it mean?

    Thanks
    It means absolute value.
    https://www.mathsisfun.com/numbers/absolute-value.html
    Offline

    13
    ReputationRep:
    Modulus function has been applied

    It makes any negative number positive.

    E.g. |-5| = 5

    So |x|, or mod x, is definitely a positive value
    • Thread Starter
    Offline

    8
    ReputationRep:
    (Original post by LeapingLucy)
    Modulus function has been applied

    It makes any negative number positive.

    E.g. |-5| = 5

    So |x|, or mod x, is definitely a positive value
    (Original post by an_atheist)
    It's the modulus function. It gives the absolute value of a function (if x>0 |x|=x, if x<0 |x|=-x)
    Thanks, really helpful answers .
    Offline

    15
    ReputationRep:
    (Original post by an_atheist)
    It's the modulus function. It gives the absolute value of a function (if x>0 |x|=x, if x<0 |x|=-x)
    What about if x=0?
    • Community Assistant
    Offline

    15
    ReputationRep:
    (Original post by B_9710)
    What about if x=0?
    You get 0.
    Offline

    15
    ReputationRep:
    (Original post by an_atheist)
    You get 0.
    I know, I was being pedantic because you didn't define it.
    Offline

    3
    ReputationRep:
    The absolute value is The correct term yea it's not just The negative made positive incase The question asks for The absolute value And not |x|
    Offline

    2
    ReputationRep:
    It is used to define the "determinant of x".
    Offline

    2
    ReputationRep:
    Its the mod function
    if any negative value for e.g l -2 l this will ALWAYS come out positive
    • Community Assistant
    Offline

    18
    ReputationRep:
    |x|= \sqrt{x^2}
    Offline

    20
    ReputationRep:
    many calculators have the Abs function which does the same thing
 
 
 
  • 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
    Will you be richer or poorer than your parents?
    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
  • 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.