Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Differentiate an equation

  1. Nov 13, 2011 #1

    fluidistic

    User Avatar
    Gold Member

    My friend came up with the following:
    [itex]2x=1 \Rightarrow \frac{d}{dx}(2x)=\frac{d}{dx}1 \Rightarrow 2=0[/itex]. Shamefully I do not see what's wrong with this reasoning!
    Can someone help me? :)
     
  2. jcsd
  3. Nov 13, 2011 #2

    LCKurtz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    2x=1 is not an identity. It is only true for x = 1/2.
     
  4. Nov 13, 2011 #3

    fluidistic

    User Avatar
    Gold Member

    Thank you LcKurtz, that makes sense.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Differentiate an equation
  1. Differential Equation (Replies: 2)

  2. Differential Equation (Replies: 1)

Loading...