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[Forum Game] Math error


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Here is a very good example of the kinds of havoc that can arise when you divide by zero.  See if you can find the mistake that I made in the work below.

 

  1. eq0004MP.gifempty.gifeq0004M.gifempty.gif                                                    We’ll start assuming this to be true.
     
  2. eq0005MP.gifempty.gifeq0005M.gifempty.gif                                                 Multiply both sides by a.
     
  3. eq0006MP.gifempty.gifeq0006M.gifempty.gif                                  Subtract eq0007MP.gifempty.gifeq0007M.gifempty.gif from both sides.
     
  4. eq0008MP.gifempty.gifeq0008M.gifempty.gif                     Factor both sides.
     
  5. eq0009MP.gifempty.gifeq0009M.gifempty.gif                                               Divide both sides by eq0010MP.gifempty.gifeq0010M.gifempty.gif.
     
  6. eq0011MP.gifempty.gifeq0011M.gifempty.gif                                                  Recall we started off assuming eq0012MP.gifempty.gifeq0012M.gifempty.gif.
     
  7. eq0013MP.gifempty.gifeq0013M.gifempty.gif                                                     Divide both sides by b.

 

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