A delivery service must deliver packages at Buckman ( B ) , Chatfield ( C ) , Dayton ( D ) , and Evansville ( E ) and return to Arlington ( A ) , the home base. Figure 6-42 shows a graph of the estimated travel times (in minutes) between the cities. a. Find the nearest-neighbor tour with starting vertex A . Give the total travel time of this tour. b. Find the nearest-neighbor tour with starting vertex D . Give the total travel time of this tour. Write the tour as it would be starting and ending at A . Give the total travel time of this tour.
A delivery service must deliver packages at Buckman ( B ) , Chatfield ( C ) , Dayton ( D ) , and Evansville ( E ) and return to Arlington ( A ) , the home base. Figure 6-42 shows a graph of the estimated travel times (in minutes) between the cities. a. Find the nearest-neighbor tour with starting vertex A . Give the total travel time of this tour. b. Find the nearest-neighbor tour with starting vertex D . Give the total travel time of this tour. Write the tour as it would be starting and ending at A . Give the total travel time of this tour.
Solution Summary: The author explains that the nearest neighbor rule gives the optimal tour in terms of time, distance or cost.
A delivery service must deliver packages at Buckman
(
B
)
, Chatfield
(
C
)
, Dayton
(
D
)
, and Evansville
(
E
)
and return to Arlington
(
A
)
, the home base. Figure 6-42 shows a graph of the estimated travel times (in minutes) between the cities.
a. Find the nearest-neighbor tour with starting vertex
A
. Give the total travel time of this tour.
b. Find the nearest-neighbor tour with starting vertex
D
. Give the total travel time of this tour. Write the tour as it would be starting and ending at
A
.
By considering appropriate series expansions,
ex · ex²/2 . ¸²³/³ . . ..
=
= 1 + x + x² +……
when |x| < 1.
By expanding each individual exponential term on the left-hand side
and multiplying out, show that the coefficient of x 19 has the form
1/19!+1/19+r/s,
where 19 does not divide s.
Let
1
1
r
1+
+ +
2 3
+
=
823
823s
Without calculating the left-hand side, prove that r = s (mod 823³).
For each real-valued nonprincipal character X mod 16, verify that
L(1,x) 0.
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