
Com 15 Revision A1 1C 2025
Authored by ariel gamboa
Mathematics
University
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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
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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