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Function machine problem

  1. Aug 18, 2006 #1
    If we have function machine, which change numbers 1,2,4 and 7 like this

    1 --> 4
    2 --> 8
    4 --> 16
    7 --> 28

    How i know simple, what is function, what machine use? :frown:

    ( I don't speak very well english )
     
  2. jcsd
  3. Aug 18, 2006 #2

    berkeman

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    Staff: Mentor

    From a numerical perspective, it looks like a straightforward scaling of the input number to get the output number (question -- what is the scale factor?).

    From a binary state machine perspective, it looks like a shift left by a constant number of bits. How many bits?
     
  4. Aug 20, 2006 #3
    Machine? What are you talking about? Specifying a function at only 4 points does not specify the function, but for simple purposes you can consider the function to be a constant multiple of the input.
     
  5. Aug 22, 2006 #4
    what did you mean by that question? can you please elaborate?
     
    Last edited: Aug 22, 2006
  6. Aug 22, 2006 #5

    lo2

    User Avatar

    What about:

    [tex]f(x)=4x[/tex]

    As:

    [tex]
    f(1)=4
    f(2)=8
    f(4)=16
    f(7)=28
    [/tex]
     
  7. Aug 23, 2006 #6
    What lo2 said with a domain of {1,2,4,7}
     
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