True or False? In Exercises 49 and 50, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text. (a) A vector space consists of four entities: a set of vectors , a set of scalars, and two operations. (b) The set of all integers with the standard operations is a vector space. (c) The set of all ordered triples ( x , y , z ) of real numbers, where y ≥ 0 , with the standard operations on R 3 is a vector space.
True or False? In Exercises 49 and 50, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text. (a) A vector space consists of four entities: a set of vectors , a set of scalars, and two operations. (b) The set of all integers with the standard operations is a vector space. (c) The set of all ordered triples ( x , y , z ) of real numbers, where y ≥ 0 , with the standard operations on R 3 is a vector space.
True or False? In Exercises 49 and 50, determine whether each statement is true or false. If a statement is true, give a reason or cite an appropriate statement from the text. If a statement is false, provide an example that shows the statement is not true in all cases or cite an appropriate statement from the text.
(a) A vector space consists of four entities: a set of vectors, a set of scalars, and two operations. (b) The set of all integers with the standard operations is a vector space.
(c) The set of all ordered triples
(
x
,
y
,
z
)
of real numbers, where
y
≥
0
, with the standard operations on
R
3
is a vector space.
Quantities that have magnitude and direction but not position. Some examples of vectors are velocity, displacement, acceleration, and force. They are sometimes called Euclidean or spatial vectors.
Determine whether the statement "It is possible to find the cross product of two vectors in a two-dimensional coordinate system. " is true or false. If it is false, explain why or give an example that shows it is false.
Write each vector as a linear combination of the vectors in S. (If not possible, enter IMPOSSIBLE.)
S = {(6, 7, 8, 6), (4, 6, −4, 1)}
(a) U = (26, 55, 40, 2)
U=
+
(b) v = (43, 113,
(43,
113, -18, 13)
V =
1 +
$2
(c)
w = (-4, -14, 29, 51)
W =
1 +
(d) z = (12,-6, 9,
z =
9, 39)
.
1 +
52
Let W be the set of all vectors of the form shown on the right, where a and b represent arbitrary real numbers. Find a set S of vectors that spans W, or give an example or an explanation
showing why W is not a vector space.
- a+1
a - 4b
3b +a
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