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Solving an equation in x

  1. Apr 3, 2014 #1
    1. The problem statement, all variables and given/known data

    if f(x) = 1/x
    solve the equations f(x) = y in x. There may be different cases depending on y.


    3. The attempt at a solution
    The wording here is kind of confusing, how am I supposed to solve this equation? What does it mean is a better question. What would I put in the solution set?
     
    Last edited: Apr 3, 2014
  2. jcsd
  3. Apr 3, 2014 #2
    The question is not clear at all.
     
  4. Apr 3, 2014 #3

    HallsofIvy

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    Perhaps you meant "solve the equation y= 1/x for x. That would be very easy to do.
     
  5. Apr 3, 2014 #4

    Fredrik

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    I agree with Dirk and Halls. The problem statement is nonsense, but if it's actually written like that, it's likely that they meant this: Let f be the function defined by f(x)=1/x for all x. Solve the equation f(x)=y for x.
     
  6. Apr 3, 2014 #5
    Well here is the actual question 5ba137.png
     
  7. Apr 3, 2014 #6

    Ray Vickson

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    Was ##f(x) = 1/x## specified in an earlier part of the question? If not, then the actual question is very different from what you first wrote here.
     
  8. Apr 3, 2014 #7
    Well there were a bunch of different functions, and I had to do this question for all of them.
     
  9. Apr 3, 2014 #8

    Fredrik

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    I don't know why they wrote "in", but you're definitely supposed to solve the equation f(x)=y for x.

    Maybe they're thinking that a phrase like "f(x)=y is an equation in x" is a valid way to ensure that they can now say "solve the equation" instead of "solve the equation for x". Or maybe it was just an editing mistake.
     
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