In Exercises 33-36, sketch the graph of a function having the given properties. 33. Defined for 0≤x≤ 10; relative maximum point at x = 3; absolute maximum value at x = 10 lative mini-

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter3: The Derivative
Section3.CR: Chapter 3 Review
Problem 67CR
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140 CHAPTER 2 Applications of the Derivative
29. Number of U.S. Farms Figure 22 gives the number of U.S.
farms in millions from 1920 (r = 20) to 2000 (100). In
what year was the number of farms decreasing most rapidly?
G
U.S. Farms (millions)
adt
mode
Y
dera (1900)
0 10 20 30 40 50 60 70 80 90 100
(2000)
Time (years)
Figure 22 Number of U.S. farms.
Consumer price index
(dollars)
30. Consumer Price Index Figure 23 shows the graph of the con-
sumer price index for the years 1983 (r= 0) through 2002
(119). This index measures how much a basket of com-
modities that costs $100 in the beginning of 1983 would cost
at any given time. In what year was the rate of increase of the
index greatest? The least?
190
175
160
145
130
115
100
01 cod sku
20
Oh to ho
0
et (1983)
3300
Tom
8
0241
12
16
CE
t
19
(2002)
4
bas stan ge Time (years)
Figure 23 Consumer price index.
31. Velocity of a Parachutist Let s(t) be the distance (in feet) trav-
eled by a parachutist after t seconds from the time of opening
the chute, and suppose that s(t) has the line y = -15t + 10
sinibal levingle af de d
Solutions to Check Your Understanding 2.1
1. The curve is concave up, so the slope increases. Even though
the curve itself is decreasing, the slope becomes less negative
as we move from left to right.
2. At x= 3. We have drawn in tangent lines at three points in
Fig. 24. Note that as we move from left to right, the slopes
decrease steadily until the point (3, 2), at which time they start
to increase. This is consistent with the fact that the graph is
concave down (hence slopes are decreasing) to the left of (3, 2)
and concave up (hence, slopes are increasing) to the right of
(3, 2). Extreme values of slopes always occur at inflection.
points.
as an asymptote. What does this imply about the velocity of
the parachutist? [Note: Distance traveled downward is given a
negative value.]
32. Let P(1) be the population of a bacteria culture after / days and
suppose that P() has the line y = 25,000,000 as an asymptote.
What does this imply about the size of the population?
In Exercises 33-36, sketch the graph of a function having the given
properties.
33. Defined for 0≤x≤ 10; relative maximum point at x = 3;
absolute maximum value at x = 10
34. Relative maximum points at x = 1 and x = 5; relative mini-
mum point at x = 3; inflection points at x = 2 and x = 4
35. Defined and increasing for all x ≥ 0; inflection point at x = 5;
asymptotic to the line y()x+ 5
36. Defined for x ≥ 0; absolute minimum value at x = 0; relative
maximum point at x = 4; asymptotic to the line y = () +1
37. Consider a smooth curve with no undefined points.
(a) If it has two relative maximum points, must it have a rela-
tive minimum point?
(b) If it has two relative extreme points, must it have an inflec-
tion point?
38. If the function f(x) has a relative minimum at x = a and a
relative maximum at x = b, must f(a) be less than f(b)?
TECHNOLOGY EXERCISES
39. Graph the function
f(x) =
in the window [0, 4] by [-15, 15]. For what value of x does
f(x) have a vertical asymptote?
40. The graph of the function
1
x32x²+x-2
f(x)=
2x²-1
.5.x² +6
has a horizontal asymptote of the form y = c. Estimate the
od value of c by graphing f(x) in the window [0, 50] by [-1, 6].
41. Simultaneously graph the functions.
Figure 24
1
y=+x and y = x
X
in the window [-6, 6] by [-6, 6]. Describe the asymptote of
the first function.
Y
(1, 1)
(3, 2)
(5, 4)
dolce
Transcribed Image Text:140 CHAPTER 2 Applications of the Derivative 29. Number of U.S. Farms Figure 22 gives the number of U.S. farms in millions from 1920 (r = 20) to 2000 (100). In what year was the number of farms decreasing most rapidly? G U.S. Farms (millions) adt mode Y dera (1900) 0 10 20 30 40 50 60 70 80 90 100 (2000) Time (years) Figure 22 Number of U.S. farms. Consumer price index (dollars) 30. Consumer Price Index Figure 23 shows the graph of the con- sumer price index for the years 1983 (r= 0) through 2002 (119). This index measures how much a basket of com- modities that costs $100 in the beginning of 1983 would cost at any given time. In what year was the rate of increase of the index greatest? The least? 190 175 160 145 130 115 100 01 cod sku 20 Oh to ho 0 et (1983) 3300 Tom 8 0241 12 16 CE t 19 (2002) 4 bas stan ge Time (years) Figure 23 Consumer price index. 31. Velocity of a Parachutist Let s(t) be the distance (in feet) trav- eled by a parachutist after t seconds from the time of opening the chute, and suppose that s(t) has the line y = -15t + 10 sinibal levingle af de d Solutions to Check Your Understanding 2.1 1. The curve is concave up, so the slope increases. Even though the curve itself is decreasing, the slope becomes less negative as we move from left to right. 2. At x= 3. We have drawn in tangent lines at three points in Fig. 24. Note that as we move from left to right, the slopes decrease steadily until the point (3, 2), at which time they start to increase. This is consistent with the fact that the graph is concave down (hence slopes are decreasing) to the left of (3, 2) and concave up (hence, slopes are increasing) to the right of (3, 2). Extreme values of slopes always occur at inflection. points. as an asymptote. What does this imply about the velocity of the parachutist? [Note: Distance traveled downward is given a negative value.] 32. Let P(1) be the population of a bacteria culture after / days and suppose that P() has the line y = 25,000,000 as an asymptote. What does this imply about the size of the population? In Exercises 33-36, sketch the graph of a function having the given properties. 33. Defined for 0≤x≤ 10; relative maximum point at x = 3; absolute maximum value at x = 10 34. Relative maximum points at x = 1 and x = 5; relative mini- mum point at x = 3; inflection points at x = 2 and x = 4 35. Defined and increasing for all x ≥ 0; inflection point at x = 5; asymptotic to the line y()x+ 5 36. Defined for x ≥ 0; absolute minimum value at x = 0; relative maximum point at x = 4; asymptotic to the line y = () +1 37. Consider a smooth curve with no undefined points. (a) If it has two relative maximum points, must it have a rela- tive minimum point? (b) If it has two relative extreme points, must it have an inflec- tion point? 38. If the function f(x) has a relative minimum at x = a and a relative maximum at x = b, must f(a) be less than f(b)? TECHNOLOGY EXERCISES 39. Graph the function f(x) = in the window [0, 4] by [-15, 15]. For what value of x does f(x) have a vertical asymptote? 40. The graph of the function 1 x32x²+x-2 f(x)= 2x²-1 .5.x² +6 has a horizontal asymptote of the form y = c. Estimate the od value of c by graphing f(x) in the window [0, 50] by [-1, 6]. 41. Simultaneously graph the functions. Figure 24 1 y=+x and y = x X in the window [-6, 6] by [-6, 6]. Describe the asymptote of the first function. Y (1, 1) (3, 2) (5, 4) dolce
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