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Need help with a math function

  1. Jan 21, 2008 #1
    Hi I need help!
    Find f(3)
    f(x) = (1/x, x > 3 ; 2x, x < or equal to 3)
    How can i solve this problem?
  2. jcsd
  3. Jan 21, 2008 #2


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    Science Advisor

    Follow the instructions!

    You are given two conditions: "x> 3" and "x< or equal to 3". Which of those does "3" satisfy?

    Now do the calculation corresponding to that condition:

    If "x> 3" then f(x)= 1/x.

    If "x< or equal to 3" then f(x)= 2x.
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