The new forums will be named Coin Return (based on the most recent vote)! You can check on the status and timeline of the transition to the new forums here.
The Guiding Principles and New Rules document is now in effect.

Integration Mechanics

Sir Red of the MantiSir Red of the Manti Registered User regular
edited November 2009 in Help / Advice Forum
So I'm working away at an assignment, and I run into a question that looks like this:
Integrate (dx / (x + x^(1/3))) dx
My question is, is this a typo, or is there actually a way to integrate an expression that features dx twice like this?

Sir Red of the Manti on

Posts

  • Dunadan019Dunadan019 Registered User regular
    edited November 2009
    its most likely a typo and meant to be dy/(x + x^(1/3)) dx

    Dunadan019 on
  • Dunadan019Dunadan019 Registered User regular
    edited November 2009
    wait, is this question dx/((x + x^(1/3))) dx) or as you wrote it?

    cause if its as you wrote it then its just a double integral.

    you pull out the dx from the fraction so that you have (1 / (x + x^(1/3))) dx dx and integrate twice wrt x to get rid of them both.

    Dunadan019 on
  • Sir Red of the MantiSir Red of the Manti Registered User regular
    edited November 2009
    Dunadan019 wrote: »
    wait, is this question dx/((x + x^(1/3))) dx) or as you wrote it?

    cause if its as you wrote it then its just a double integral.

    you pull out the dx from the fraction so that you have (1 / (x + x^(1/3))) dx dx and integrate twice wrt x to get rid of them both.

    It was as I wrote it (not a typo apparently), and thanks to this advice I managed to solve the thing finally, finishing a 33 page assignment in the process.

    Sir Red of the Manti on
Sign In or Register to comment.