Match the following elements of the matrix A | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Let $A = \begin{bmatrix} 1 & -1 & 0 \ 0 & 4 & 2 \ 3 & -4 & 6 \end{bmatrix}$.The co-factor $C_{ij}$ of an element $a_{ij}$ is given by $(-1)^{i+j

Vedclass · Accepted Answer

$A-4, B-2, C-1, D-3$

Vedclass · Answer

(C) Let $A = \begin{bmatrix} 1 & -1 & 0 \ 0 & 4 & 2 \ 3 & -4 & 6 \end{bmatrix}$.The co-factor $C_{ij}$ of an element $a_{ij}$ is given by $(-1)^{i+j} M_{ij}$,where $M_{ij}$ is the minor.For element $-1$ (at position $a_{12}$): $C_{12} = (-1)^{1+2} \begin{vmatrix} 0 & 2 \ 3 & 6 \end{vmatrix} = -1(0 - 6) = 6$. So,$A-4$.For element $1$ (at position $a_{11}$): $C_{11} = (-1)^{1+1} \begin{vmatrix} 4 & 2 \ -4 & 6 \end{vmatrix} = 1(24 - (-8)) = 32$. So,$B-2$.For element $3$ (at position $a_{31}$): $C_{31} = (-1)^{3+1} \begin{vmatrix} -1 & 0 \ 4 & 2 \end{vmatrix} = 1(-2 - 0) = -2$. So,$C-1$.For element $6$ (at position $a_{33}$): $C_{33} = (-1)^{3+3} \begin{vmatrix} 1 & -1 \ 0 & 4 \end{vmatrix} = 1(4 - 0) = 4$. So,$D-3$.Thus,the matching is $A-4, B-2, C-1, D-3$.Therefore,option $C$ is correct.

Element	Co-factor
$A$. $-1$	$(1)$ $-2$
$B$. $1$	$(2)$ $32$
$C$. $3$	$(3)$ $4$
$D$. $6$	$(4)$ $6$
	$(5)$ $-6$

Match the following elements of the matrix $A = \begin{bmatrix} 1 & -1 & 0 \\ 0 & 4 & 2 \\ 3 & -4 & 6 \end{bmatrix}$ with their co-factors and choose the correct answer.
Element Co-factor
$A$. $-1$ $(1)$ $-2$
$B$. $1$ $(2)$ $32$
$C$. $3$ $(3)$ $4$
$D$. $6$ $(4)$ $6$
$(5)$ $-6$

Similar Questions

Monascus purpureus is a yeast used commercially in the production of :

Two rain drops reach the earth with different terminal velocities having ratio $9:4$. Then the ratio of their volumes is

If $A$ is the areal velocity of a planet of mass $M$,its angular momentum is

$A$ particle of mass $M$ is situated at the centre of a spherical shell of mass $M$ and radius $a$. The gravitational potential at a point situated at a distance of $\frac{a}{2}$ from the centre will be:

In the circuit shown,the reading of the Ammeter is doubled after the switch is closed. Each resistor has a resistance $1\,\Omega$ and the ideal cell has an $e.m.f.$ $10\,V$. Then,the Ammeter has a coil resistance equal to ............ $\Omega$

Vedclass Test Series

Exam Paper Generator

Online Exam Module

Match the following elements of the matrix $A = \begin{bmatrix} 1 & -1 & 0 \\ 0 & 4 & 2 \\ 3 & -4 & 6 \end{bmatrix}$ with their co-factors and choose the correct answer.ElementCo-factor$A$. $-1$$(1)$ $-2$$B$. $1$$(2)$ $32$$C$. $3$$(3)$ $4$$D$. $6$$(4)$ $6$$(5)$ $-6$