## Thomas' Calculus 13th Edition

Published by Pearson

# Chapter 14: Partial Derivatives - Section 14.1 - Functions of Several Variables - Exercises 14.1 - Page 787: 35

#### Answer

$d$

#### Work Step by Step

There are many slides sliding down form one side to another which shows that the graph of 2D level curves has many semi-oval rings whose center is on one side and dispersed to the other as shown in the graph $d$.

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