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Help solving this equation!

  • 06-05-2012 07:13PM
    #1
    ironictoaster
    Registered Users, Registered Users 2 Posts: 4,183 ✭✭✭


    21EPQ.jpg

    I was just wondering do I just sub in x/t for t. Really struggling with getting my head around this one.


Comments

  • #2
    Brussels Sprout
    Registered Users, Registered Users 2 Posts: 7,849 ✭✭✭Brussels Sprout


    You'll need to calculate dx/dt in terms of z from the second equation (don't forget to use the product rule).

    Try dividing both sides of the first equation by t^2. It should make things easier for you.


  • #3
    ironictoaster
    Registered Users, Registered Users 2 Posts: 4,183 ✭✭✭ironictoaster


    so z=x/t or x=zt.

    I assume when using the product rule its u=z v=t?


  • #4
    ironictoaster
    Registered Users, Registered Users 2 Posts: 4,183 ✭✭✭ironictoaster


    I've gotten the answer from the product rule from the solution but it doesn't match up when I do it myself. Any ideas?


  • #5
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    If you post what you've got now, we might be able to help.


  • #6
    ironictoaster
    Registered Users, Registered Users 2 Posts: 4,183 ✭✭✭ironictoaster


    Sorry to reply, I figured it out in the end, careless mistakes was the problem, thanks though.


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