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Pick the most
appropriate answer.
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Q1. Given [A] = then
[A] is a (an) ______________ matrix.
diagonal
identity
lower triangular
upper triangular
Q2. A square matrix [A] is lower
triangular if
Q3. Given
 ,
then if [C] = [A] [B],
then c31=
_____________________
-58.2
-37.6
219.4
259.4
Q4. The following system of equations
has ____________ solution(s).
x + y = 2
6x+6y =12
infinite
no
two
unique
Q5 .
Consider there are only
two computer companies in a country. The companies are named Dude
and Imac. Each year, Dude keeps 1/5th
of its customers, while the rest switch to Imac. Each year,
Imac keeps 1/3rd of its customers, while the rest
switch to Dude. If in 2003, Dude had 1/6th
of the market and Imac had 5/6th of the market,
what will be the share of Dude computers when the market becomes
stable?
37/90
5/11
6/11
53/90
Q6.
Three kids - Jim, Corey
and David receive an inheritance of $2,253,453. The money is put in
three trusts but is not divided equally to begin with. Corey's
trust is three
times that of David's because Corey made an A in Dr. Kaw’s
class. Each trust is put in an interest generating investment. The
three trusts of Jim, Corey and David pays an interest of 6%, 8%, 11%,
respectively. The total interest of all the three trusts combined at
the end of the first year is $190,740.57. The equations to find the
trust money of Jim (J), Corey (C) and David (D) in
a matrix form is
Complete Solution
Multiple choice questions on other topics
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