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1. Kia Says:
   March 11th, 2008 at 9:59 am

   y = 1 / x-2
   The domain is all real number, except the numbers that make the denominator 0, since that would make your statement undefined
   x – 2 = 0
   x = 2
   So you domain is all real number except 2:
   (-infinity, 2) U (2, +infinity)

   And the range is all real numbers
   (-infinity, +infinity)

   y = -√x
   Since we are not dealing with imaginary numbers, the domain is all numbers that are not negative.
   [0, +infinity)

   And since the square root of a number is a positive number, the range is all numbers that are not positive
   (-infinity, 0]

   y=2x / x-4
   The domain is all real number, except the numbers that make the denominator 0, since that would make your statement undefined
   x – 4 = 0
   x = 4
   So you domain is all real number except 4:
   (-infinity, 4) U (4, +infinity)

   And the range is all real numbers
   (-infinity, +infinity)

   I hope this helped

   Kia

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