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

    6
    ReputationRep:
    what would happen would it be just -1
    Offline

    19
    ReputationRep:
    \dfrac{x}{x^{-1}} = x(x^{-1})^{-1} = \dddot
    Offline

    5
    ReputationRep:
    It would be a cm^2 because you're dividing cm by 1/cm, which is just cm x cm.
    Offline

    20
    ReputationRep:
    (Original post by GGYSM)
    It would be a cm^2 because you're dividing cm by 1/cm, which is just cm x cm.
    This is the right answer OP


    (Original post by alow)
    \dfrac{x}{x^{-1}} = x(x^{-1})^{-1} = \dddot
    That gives 1/x^2 which is wrong
    Offline

    9
    ReputationRep:
    (Original post by ChaoticButterfly)
    \dfrac{x}{x^{-1}} = x(x^{-1})^{-1} = \dddot


    That gives 1/x^2 which is wrong
    Really? Surely the last part comes to x, so then multiplying it by the first part gives x^2. It looks like it gives the same answer as the one which you have identified as correct.
    Offline

    20
    ReputationRep:
    (Original post by Pangol)
    Really? Surely the last part comes to x, so then multiplying it by the first part gives x^2. It looks like it gives the same answer as the one which you have identified as correct.
    I did it on some paper

    Yep you are right.... I've spent to long out in the real world and my algebra has gone to **** :-/

    I added the two -1 powers instead of multiplying. Although even then I still got the wrong answer doing that lol, should have been 1/x. Would have got zero marks for my working out.
    Offline

    9
    ReputationRep:
    (Original post by ChaoticButterfly)
    I did it on some paper

    Yep you are right.... I've spent to long out in the real world and my algebra has gone to **** :-/

    I added the two -1 powers instead of multiplying. Although even then I still the wrong answer doing that lol, should have been 1/x
    Hey, happens to us all from time to time...
    • Thread Starter
    Offline

    6
    ReputationRep:
    wait so whats the answer
    Offline

    9
    ReputationRep:
    (Original post by Loop hoop)
    wait so whats the answer
    (Original post by GGYSM)
    It would be a cm^2 because you're dividing cm by 1/cm, which is just cm x cm.
    ..
    Offline

    5
    ReputationRep:
    (Original post by Loop hoop)
    wait so whats the answer
    cm^2 (centimeter squared)
    Offline

    9
    ReputationRep:
    Is your question pertaining to spectroscopy? Infra red spectroscopy maybe?

    The x axis of the spectrum is wavenumber, i.e. the number of waves per unit length. Usually this is measured in the unit cm-1, the reciprocal of the wavelength of the IR radiation being used.
 
 
 
  • 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?
  • 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.