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Quick Product rule question

  • 02-04-2012 3:15pm
    #1
    joeperry
    Closed Accounts Posts: 527 ✭✭✭


    Hi i'm practicing the product rule and this one is slightly different to what i've learned, Would i be right working it out like this ? thanks


    Solve: y=(x^2 - 4x +1) ln(x)

    U= x^2 - 4x +1
    V= ln(x)


    so i think it ends up with this, can i go further on?

    y = (x^2-4x+1) 1/x + ln(x) (2x-4)


Comments

  • #2
    Michael Collins
    Moderators, Science, Health & Environment Moderators Posts: 1,852 Mod ✭✭✭✭Michael Collins


    Looks fine. You could take the 1/x value inside the parentheses i.e. divide x into each term inside - if you want. But the answer is correct.

    Just a small point, when you say "solve" in your question above, you really should say "differentiate with respect to x". The equation you gave can't be "solved" as such the way it is stated.


  • #3
    joeperry
    Closed Accounts Posts: 527 ✭✭✭joeperry


    Thank you :)


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