Test 3B Fall 06
You scored 50 out of 50
Question 1
Your answer is CORRECT.
The matrics A, B and C are given by
and
D = AB - 4C
. Give the value in the third row and second column of
D
.
a )
b )
c )
d )
e )
f )
None of the above.
Question 2
Your answer is CORRECT.
Let
Use interval notation to describe the set of values of
a
for which
C
is a nonsingular
matrix.
a )
( -
, -2 )
( -2 , 4 )
( 4 ,
)
b )
( -
, -4 )
( -4 , -1 )
( -1 ,
)
c )
( -
, -5 )
( -5 , 3 )
( 3 ,
)
d )
( -
, -2 )
( 4 , -1 )
( -1 ,
)
e )
( -
, -4 )
( -4 , 2 )
( 2 ,
)
f )
None of the above.
Question 3
Your answer is CORRECT.
The linear, homogeneous, constant coefficient equation of least order that has

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