The Marriage Problem There is an infamous problem from mathematics that attempts to quantify the number of potential mates one should date before choosing one’s “true love.” The function L ( x ) = − x ln x represents the probability of finding the ideal mate after rejecting the first x proportion of potential mates. For example, if you reject the first 20 % = 0.20 of individuals you date, the probability of finding the ideal mate to be greater than 0.332 and you are only willing to date up to 20 individuals, you should reject the first 0.2 ( 20 ) = 4 individuals before attempting to decide on the ideal mate. Presumably, you are using those first 4 individuals to help you decide which traits you value in a mate. Determine and interpret L ( 0.1 ) . Determine and interpret L ( 0.6 ) . What is the domain of L ? Graph L = L ( x ) over the domain. Judging on the basis of the approach suggested by the model, what is the value of x that maximizes L ? What is the highest probability of finding the ideal mate?
The Marriage Problem There is an infamous problem from mathematics that attempts to quantify the number of potential mates one should date before choosing one’s “true love.” The function L ( x ) = − x ln x represents the probability of finding the ideal mate after rejecting the first x proportion of potential mates. For example, if you reject the first 20 % = 0.20 of individuals you date, the probability of finding the ideal mate to be greater than 0.332 and you are only willing to date up to 20 individuals, you should reject the first 0.2 ( 20 ) = 4 individuals before attempting to decide on the ideal mate. Presumably, you are using those first 4 individuals to help you decide which traits you value in a mate. Determine and interpret L ( 0.1 ) . Determine and interpret L ( 0.6 ) . What is the domain of L ? Graph L = L ( x ) over the domain. Judging on the basis of the approach suggested by the model, what is the value of x that maximizes L ? What is the highest probability of finding the ideal mate?
Solution Summary: The author calculates the probability of finding the ideal mate after rejecting the first x proportions of potential mates.
The Marriage Problem There is an infamous problem from mathematics that attempts to quantify the number of potential mates one should date before choosing one’s “true love.” The function
L
(
x
)
=
−
x
ln
x
represents the probability of finding the ideal mate after rejecting the first
x
proportion of potential mates. For example, if you reject the first
20
%
=
0.20
of individuals you date, the probability of finding the ideal mate to be greater than
0.332
and you are only willing to date up to
20
individuals, you should reject the first
0.2
(
20
)
=
4
individuals before attempting to decide on the ideal mate. Presumably, you are using those first
4
individuals to help you decide which traits you value in a mate.
Determine and interpret
L
(
0.1
)
.
Determine and interpret
L
(
0.6
)
.
What is the domain of
L
?
Graph
L
=
L
(
x
)
over the domain.
Judging on the basis of the approach suggested by the model, what is the value of
x
that maximizes
L
? What is the highest probability of finding the ideal mate?
Points z1 and z2 are shown on the graph.z1 is at (4 real,6 imaginary), z2 is at (-5 real, 2 imaginary)Part A: Identify the points in standard form and find the distance between them.Part B: Give the complex conjugate of z2 and explain how to find it geometrically.Part C: Find z2 − z1 geometrically and explain your steps.
A polar curve is represented by the equation r1 = 7 + 4cos θ.Part A: What type of limaçon is this curve? Justify your answer using the constants in the equation.Part B: Is the curve symmetrical to the polar axis or the line θ = pi/2 Justify your answer algebraically.Part C: What are the two main differences between the graphs of r1 = 7 + 4cos θ and r2 = 4 + 4cos θ?
A curve, described by x2 + y2 + 8x = 0, has a point A at (−4, 4) on the curve.Part A: What are the polar coordinates of A? Give an exact answer.Part B: What is the polar form of the equation? What type of polar curve is this?Part C: What is the directed distance when Ø = 5pi/6 Give an exact answer.
Chapter 4 Solutions
Precalculus: Concepts Through Functions, A Unit Circle Approach to Trigonometry (4th Edition)
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