Answer
Refer to sketch in picture
Work Step by Step
$f(x, y) = \ln(xy)$
Finding domain of $f(x, y)$
Domain = {x, y are members of Real numbers and $xy \gt 0$}
Calculus, 10th Edition (Anton)
by Anton, Howard
Published by
Wiley
ISBN 10:
0-47064-772-8
ISBN 13:
978-0-47064-772-1
Chapter 13 - Partial Derivatives - 13.1 Functions Of Two Or More Variables - Exercises Set 13.1 - Page 915: 26
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