10 -5 14 Let A = 0 2 -6 |and b = 10 . Denote the columns of A by a, a2, a3, and let W = Span (a,, a2, az}. -4 4 - 30 a. Is b in fa,, a2, az}? How many vectors are in fa,, a2, az}? b. Is b in W? How many vectors are in W? c. Show that a2 is in W. [Hint: Row operations are unnecessary.]

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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1 0 - 5
14
Let A =
0 2 -6
and b =
10
Denote the columns of A by a1, a2, a3, and let W= Span (a1, a2, az}.
- 4 4
- 30
a. Is b in fa1, a2, az? How many vectors are in (a1, a2, az}?
b. Is b in W? How many vectors are in W?
c. Show that a, is in W. [Hint: Row operations are unnecessary.]
a. Is b in fa,, a2; az}?
? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice.
O A. No, b is not in (a,, a2, a3 since b is not equal to a1, a2, or a3.
B. Yes, b is in fa1, a2, az} since b=a
(Type a whole number.)
O C. Yes, b is in {a,, a2, az} since, although b is not equal to a,, a2, or a3, it can be expressed as a linear combination of them. In particular,
Da, + Da2 + (a3.
b =
(Simplify your answers.)
D. No, b is not in (a1, a2,
a3.
az since it cannot be generated by a linear combination of a1, a2, and
Transcribed Image Text:1 0 - 5 14 Let A = 0 2 -6 and b = 10 Denote the columns of A by a1, a2, a3, and let W= Span (a1, a2, az}. - 4 4 - 30 a. Is b in fa1, a2, az? How many vectors are in (a1, a2, az}? b. Is b in W? How many vectors are in W? c. Show that a, is in W. [Hint: Row operations are unnecessary.] a. Is b in fa,, a2; az}? ? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. O A. No, b is not in (a,, a2, a3 since b is not equal to a1, a2, or a3. B. Yes, b is in fa1, a2, az} since b=a (Type a whole number.) O C. Yes, b is in {a,, a2, az} since, although b is not equal to a,, a2, or a3, it can be expressed as a linear combination of them. In particular, Da, + Da2 + (a3. b = (Simplify your answers.) D. No, b is not in (a1, a2, a3. az since it cannot be generated by a linear combination of a1, a2, and
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