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Com 15 Revision A1 1C 2025

Authored by ariel gamboa

Mathematics

University

Used 1+ times

Com 15 Revision A1 1C 2025
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5 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Dado el sistema:

x – 3y + 4z = 1
// 2x – y + 3z = k
// x + 2y – kz = 0

Si k = 1, entonces la solución es:

S = {(2/5 - z, -1/5 + z, z)}

S = {(2/5 + z, -1/5 + z, z)}

S = {(2/5 - z, 1/5 - z, z)}

S = {(2/5 + z, 1/5 -z, z)}

2.

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Dado el sistema:

x + y – 2z + w = 3

-y + 3z = k

x + z + (k2).w = 1

Indicar para que valor / valores de k, el sistema es incompatible:

k = 1

k = 2

k = 0

k = -2

k = -1

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Media Image

Indicar para que valor de k, la matriz C = A . BT no es inversible.

k = 1

k ≠ 1

k = -1

k ≠ -1

k = 0

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Sean A y B dos matrices de orden 3, con det(A) = 2k y det(B) = ½.

Indicar para que valor de k se cumple que: det(2 . AT . B-1) = 16

k = 1/2

k = -1/2

k = 2

k = -2

5.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Sea el sistema:
x + 3z = 2
// x – y + 2z = 0
// 2x – y + 5z = 2

Indicar para que valor de k, (5, 3, k) es una solución del sistema anterior:

k = 2

k = 1

k = 0

k = -1

k = -2

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