In Problems 17 - 24 , convert the given time period to years, in reduced fraction form, assuming a 360 -day year [this assumption does not affect the number of quarters 4 , months 12 , or weeks 52 in a year ]. 5 quarters
In Problems 17 - 24 , convert the given time period to years, in reduced fraction form, assuming a 360 -day year [this assumption does not affect the number of quarters 4 , months 12 , or weeks 52 in a year ]. 5 quarters
In Problems
17
-
24
, convert the given time period to years, in reduced fraction form, assuming a
360
-day year [this assumption does not affect the number of quarters
4
, months
12
, or weeks
52
in a year ].
7. [10 marks]
Let G
=
(V,E) be a 3-connected graph. We prove that for every x, y, z Є V, there is a
cycle in G on which x, y, and z all lie.
(a) First prove that there are two internally disjoint xy-paths Po and P₁.
(b) If z is on either Po or P₁, then combining Po and P₁ produces a cycle on which
x, y, and z all lie. So assume that z is not on Po and not on P₁. Now prove that
there are three paths Qo, Q1, and Q2 such that:
⚫each Qi starts at z;
• each Qi ends at a vertex w; that is on Po or on P₁, where wo, w₁, and w₂ are
distinct;
the paths Qo, Q1, Q2 are disjoint from each other (except at the start vertex
2) and are disjoint from the paths Po and P₁ (except at the end vertices wo,
W1, and w₂).
(c) Use paths Po, P₁, Qo, Q1, and Q2 to prove that there is a cycle on which x, y, and
z all lie. (To do this, notice that two of the w; must be on the same Pj.)
6. [10 marks]
Let T be a tree with n ≥ 2 vertices and leaves. Let BL(T) denote the block graph of
T.
(a) How many vertices does BL(T) have?
(b) How many edges does BL(T) have?
Prove that your answers are correct.
4. [10 marks]
Find both a matching of maximum size and a vertex cover of minimum size in
the following bipartite graph. Prove that your answer is correct.
ย
ພ
Chapter 3 Solutions
Pearson eText for Finite Mathematics for Business, Economics, Life Sciences, and Social Sciences -- Instant Access (Pearson+)
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