Problems Show that the set of vectors { ( 1 , 2 , 3 ) , ( 3 , 4 , 5 ) , ( 4 , 5 , 6 ) } does not span ℝ 3 , but that it does span the subspace of ℝ 3 consisting of all vectors lying in the plane with equation x − 2 y + z = 0 .
Problems Show that the set of vectors { ( 1 , 2 , 3 ) , ( 3 , 4 , 5 ) , ( 4 , 5 , 6 ) } does not span ℝ 3 , but that it does span the subspace of ℝ 3 consisting of all vectors lying in the plane with equation x − 2 y + z = 0 .
does not span
ℝ
3
, but that it does span the subspace of
ℝ
3
consisting of all vectors lying in the plane with equation
x
−
2
y
+
z
=
0
.
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.
3. (a) Explain why there is no vector i such that (3, –1, 4) × J = (-5,1, –4). (b) Explain why
there are infinitely many vectors i such that (3, –1, 4) × i = (-5, 1,4), then find all such vectors
by expressing the components of all such vectors i in terms of a single variable.
(i) Prove that
(1, 2, 1) , (2, 1, 5) , (1, –4,7)
is linear dependent subset of R³.
(ii) Determine whether the vector (1,6, 2) is a linear combination of the vectors (1,2, –1), (3, 1, 1),
and (-4,0, 6). (Include all the steps in your reasoning.).
(b) A= np.array([[1,2],[3,4],[10,6]])
(c) A= np.array([[1,2,3],[3,4,5],[4,10,6]])
What is the vector for b, and c?
Chapter 4 Solutions
Differential Equations and Linear Algebra (4th Edition)
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