1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Simple Function Question, Can't Figure Out How Answer is Achieved

  1. Jul 26, 2014 #1
    1. The problem statement:
    Pretty straight forward:
    Simplify 2f(x)+3
    Evidently, the answer is (2+3x)/x but I don't know how to find that,

    2. Relevant equations:
    None, as far as I know

    3. The attempt at a solution:
    2f(x)+3 = 2(1/x) + 3 = 2/x + 3
    I'm of course missing some simple step or identity that could help me, but I can't come up with any thoughts on how to navigate to the correct answer.

    Any help will be greatly appreciated, thanks!
  2. jcsd
  3. Jul 26, 2014 #2
    You have (2/x) + (3/1).

    How do you add two fractions together?
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - Simple Function Question Date
Simple question on functions. Aug 17, 2011
Simple function questions - checking answer. May 16, 2011
Simple Function Question Apr 10, 2011
Simple function substitution question Apr 10, 2011
Simple questions abt functions. Aug 31, 2006