Chapter 12: Q. 56. (page 945)
For the partial derivatives given in Exercises 55–58, find the
most general form for a function of three variables, ,
with the given partial derivative.
Short Answer
The most general form ofso thatis
Chapter 12: Q. 56. (page 945)
For the partial derivatives given in Exercises 55–58, find the
most general form for a function of three variables, ,
with the given partial derivative.
The most general form ofso thatis
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Get started for freeEvaluate the following limits, or explain why the limit does not exist.
Construct examples of the thing(s) described in
the following.
Try to find examples that are different than
any in the reading.
(a) A function z = f(x, y) for which ∇f(0, 0) = 0 but f is
not differentiable at (0, 0).
(b) A function z = f(x, y) for which ∇f(0, 0) = 0 for every
point in R2.
(c) A function z = f(x, y) and a unit vector u such that
Du f(0, 0) = ∇f(0, 0) · u.
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