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1. notthejake Says:
   March 21st, 2008 at 7:07 am

   domain: x + y + z > 1
   range: (-infinity, infinity)

   the argument of a log function must be > 0; thus, x + y + z – 1 > 0, or x + y + z > 1

   the graph of a log function goes from -infinity to infinity in the y-direction– the range

2. TW K Says:
   March 21st, 2008 at 7:07 am

   What does Ln stand for?

   TW K

3. rangergordon Says:
   March 21st, 2008 at 7:07 am

   The range is (-infinity, infinity) since Ln(a) attains every value in [[R]] for 0 < a < infinity

   However, Ln(a) is undefined for a <= 0. So the domain is such that:

   x + y + z – 1 > 0
   x + y + z > 1, or

   x + y + z is on the interval (1, infinity).

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