Fuel economy. According to the U.S. Department of Energy, a vehicle’s fuel economy, in miles per gallon (mpg), decreases rapidly for speeds over 60 mph. (Sources: U.S. Dept. of Energy; a study by West, B.H., McGill, R.N., Hodgson, J.W., Sluder, S.S., and Smith, D.E., Oak Ridge National Laboratory, 1999; www.mpgforspeed.com, 2014.) a. Estimate the speed at which the absolute maximum gasoline mileage is obtained. b. Estimate the speed at which the absolute minimum gasoline mileage is obtained. c. What is the mileage obtained at 70 mph?
Fuel economy. According to the U.S. Department of Energy, a vehicle’s fuel economy, in miles per gallon (mpg), decreases rapidly for speeds over 60 mph. (Sources: U.S. Dept. of Energy; a study by West, B.H., McGill, R.N., Hodgson, J.W., Sluder, S.S., and Smith, D.E., Oak Ridge National Laboratory, 1999; www.mpgforspeed.com, 2014.) a. Estimate the speed at which the absolute maximum gasoline mileage is obtained. b. Estimate the speed at which the absolute minimum gasoline mileage is obtained. c. What is the mileage obtained at 70 mph?
Fuel economy. According to the U.S. Department of Energy, a vehicle’s fuel economy, in miles per gallon (mpg), decreases rapidly for speeds over 60 mph.
(Sources: U.S. Dept. of Energy; a study by West, B.H., McGill, R.N., Hodgson, J.W., Sluder, S.S., and Smith, D.E., Oak Ridge National Laboratory, 1999; www.mpgforspeed.com, 2014.)
a. Estimate the speed at which the absolute maximum gasoline mileage is obtained.
b. Estimate the speed at which the absolute minimum gasoline mileage is obtained.
EXAMPLE 3
Find
S
X
√√2-2x2
dx.
SOLUTION Let u = 2 - 2x². Then du =
Χ
dx =
2- 2x²
=
信
du
dx, so x dx =
du and
u-1/2 du
(2√u) + C
+ C (in terms of x).
Let g(z) =
z-i
z+i'
(a) Evaluate g(i) and g(1).
(b) Evaluate the limits
lim g(z), and lim g(z).
2-12
(c) Find the image of the real axis under g.
(d) Find the image of the upper half plane {z: Iz > 0} under the function g.
k
(i) Evaluate
k=7
k=0
[Hint: geometric series + De Moivre]
(ii) Find an upper bound for the expression
1
+2x+2
where z lies on the circle || z|| = R with R > 10. [Hint: Use Cauchy-Schwarz]
Chapter 2 Solutions
Calculus and Its Applications Plus MyLab Math with Pearson eText -- Access Card Package (11th Edition) (Bittinger, Ellenbogen & Surgent, The Calculus and Its Applications Series)
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