1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Differentiation tricks/shortcuts

  1. Mar 7, 2012 #1

    Leb

    User Avatar

    This is not a specific HW/CW question, just a gap I have and want to fill.
    I came from a school in which calculus was only introduced in the last year so I learnt only the basics.

    Now, I see more and more stuff like taking an expression, say A=B+C and simply making it to a dA=dB+dC. The problem I have is actually understanding why can we simply cancel out the 'with respect to' part ? That is in dA(x)/dx, the dx part.

    I think the main question is: When can we treat dA(x)/dx as a fraction rather then an 'operator' (could not come up with a better for d/dx).

    Thanks!
     
  2. jcsd
  3. Mar 7, 2012 #2
    Because when everything is being nice and friendly you essentially can treat them as single objects.
    If you want to rid yourself of confusion define dA = dA/dx then dA=dB+dC is returned to it's former glory.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Differentiation tricks/shortcuts
  1. Trick question? (Replies: 2)

  2. Trick question (Replies: 6)

  3. Tablecloth Trick (Replies: 4)

Loading...