Sistemas de ecuaciones lineales (Teorema de Rouchè-Fröbenius
Quiz
•
Mathematics
•
12th Grade
•
Medium
Ana Cristina Ruiz
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13 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Suponiendo que A y X son matrices cuadradas y que A+I es invertible, despeja X en la ecuación A-X=A·X
X=(A+I)-1·A
X=A·(A+I)-1
X=A+I-1·A
X=A·A+I-1
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Encuentra la matriz X que verifica que (A-3I)X=2I, donde A es una matriz de orden 3 e I es la matriz identidad de orden 3.
X=2(A-3I)-1
X=(A-3I)-1
X=2A-3I-1
X=(2A-3I)-1
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Dada la matriz A, ¿para qué valor o valores de m no es invertible?
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Se considera una matriz de orden 3 × 3 cuyas columnas son 𝐶1, 𝐶2 y 𝐶3 y cuyo determinante es 2.
Se define ahora la matriz 𝐵 cuyas columnas son −𝐶2, 𝐶3 + 𝐶2 y 3𝐶1. Calcula .
No existe
5.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Un sistema de m ecuaciones lineales y n incógnitas, con matriz de coeficientes "A" y ampliada "A*" es compatible determinado si, y sólo si
rg(A) = rg(A*) = m
m = n
rg(A) = rg(A*) = n
6.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Un sistema de m ecuaciones lineales y n incógnitas, con matriz de coeficientes "A" y ampliada "A*" es compatible indeterminado si, y sólo si
rg(A) = rg(A*) < n
m < n
rg(A) = rg(A*) < m
7.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Sea A* la matriz ampliada de un sistema compatible indeterminado que tiene 4 ecuaciones y 3 incógnitas, el rango de A* sólo puede ser
1
3
4
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