Example 1: z=x³y_x=2t and y=t² Find dz dt

Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Example 1:=x³y_x=2t and y=t²
Find
dz
dt
=
Applications:
2.As a solid right circular cylinder is heated, its radius r and
height h increase. So does surface area S. Suppose that at
the instant when r =10cm and h = 100cm, r is increasing at
0.2 cm/h and h is increasing at 0.5cm/h. How fast is S
increasing?
3.The temperature of a metal plate at (x,y) is ex-3y degrees.
A bug is walking northeast in such a way that dx/dt
=dy/dt =2. From the bugs point of view, how is the
temperature changing with time as it crosses the origin
?
Transcribed Image Text:Example 1:=x³y_x=2t and y=t² Find dz dt = Applications: 2.As a solid right circular cylinder is heated, its radius r and height h increase. So does surface area S. Suppose that at the instant when r =10cm and h = 100cm, r is increasing at 0.2 cm/h and h is increasing at 0.5cm/h. How fast is S increasing? 3.The temperature of a metal plate at (x,y) is ex-3y degrees. A bug is walking northeast in such a way that dx/dt =dy/dt =2. From the bugs point of view, how is the temperature changing with time as it crosses the origin ?
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