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5. (6 marks) Determine all values of k such that the set independent. ON -6 is linearly 6. (7 marks) Let B = = [1] Determine

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Answer #1

Question-5

.

write all 3 vectors in the matrix

1 1 |-3 {4 2 1 3 上 -6 k 8 4

R1 + R4

48 4 1 3 3 — 6k 1 2 11

R2 + R2 - R1

R3 + R3+.. R1

RA - R, R

48 4 01-1 00k+3 [00 0 /

when 07E+Y then all 3 vectors are linearly independent

.

07E+Y

上圣-3

.

.

.

.

Question-6

.

write  V1, U2, U3 in the matrix

.

A= 1 0 0 1 11 2 11 1 2 1 - 1 1

vector u is

TL- = و تا بل حلم

system Ax=u is

(1 0 2 0 1 1 | 12 -1 \1 1 1 مونا بل حلو

augmented matrix is

10 2 8 lol 1 2 | 12-1 -3

R3 R3 - 1. R

R4 + R4-1. R1

10 2 81 01 1 2 02-3 -11 01 -1 -4/

R2 HR

10 28 02-3 -11 lol 1 2 01 -1 -4

Rz + R3- R

RA + RA-Ry

10 2 8 lo 2 -3 -11 100 {oo j blr-512

R4 + R4- R

10 2 8} 02 -3 -11 [00 3 to 0 0 0 /

R3 + R3

10 28 02-3 -11 001 3 0 0 0 0 /

R2 + R2+3. R

R1 + R1 – 2. Rz

100 2 020 -2 0013 [0000

R2 + R

1 0 0 1 0 0 (ο Ο 0 1 Ο -1 3 Ο

here system is consistent so vector u in is span B

and solution is

213

so linear combination is

201 – 02 + 303 = u

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