Question 5
(a) Let a, b, c, d, e, ƒ Є K where K is a field. Suppose that the determinant of the
matrix
a cl
|df
equals 3 and the determinant of
determinant of the matrix
a+3b cl
d+3e f
ГЪ
e
[ c ] equals 2. Compute the
[5]
(b) Calculate the adjugate Adj (A) of the 2 × 2 matrix
[1 2
A
=
over R.
(c) Working over the field F3 with 3 elements, use row and column operations to put
the matrix
[6]
0123]
A
=
3210
into canonical form for equivalence and write down the canonical form. What is
the rank of A as a matrix over F3?
4
Question 2
In this question, V = Q4 and
-
U = {(x, y, z, w) EV | x+y2w+ z = 0},
W = {(x, y, z, w) € V | x − 2y + w − z = 0},
Z = {(x, y, z, w) € V | xyzw = 0}.
(a) Determine which of U, W, Z are subspaces of V. Justify your answers.
(b) Show that UW is a subspace of V and determine its dimension.
(c) Is VU+W? Is V = UW? Justify your answers.
[10]
[7]
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Different masses and
Indicated velocities
Rotational inert >
C C Chegg
39. The balls shown have different masses and speeds. Rank
the following from greatest to least:
2.0 m/s
8.5 m/s
9.0 m/s
12.0 m/s
1.0 kg
A
1.2 kg
B
0.8 kg
C
5.0 kg
D
C
a. The momenta
b. The impulses needed to stop the balls
Solved 39. The balls shown have different masses and
speeds. | Chegg.com
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