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

  1. Jul 26, 2014 #1
    1. The problem statement:
    Pretty straight forward:
    f(x)=1/x
    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?
     
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