Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • If delta equals to determinant a11 a12 a13 a21 a22 a23 a31 a32 a33 and Aij is Cofactors of aij , then value of delta is given by:

Q : 5        If      \small \Delta =\begin{vmatrix} a{_{11}} & a_1_2 & a_1_3\\ a_2_1 & a_2_2 & a_2_3\\ a_3_1 &a_3_2 &a_3_3 \end{vmatrix}   and   \small A{_{ij}}   is Cofactors of  \small a{_{ij}} ,  then the value of   \small \Delta  is given by 

               (A)  \small a_1_1A_3_1+a_1_2A_3_2+a_1_3A_3_3            

               (B) \small a_1_1A_1_1+a_1_2A_2_1+a_1_3A_3_1                        

               (C) \small a_2_1A_1_1+a_2_2A_1_2+a_2_3A_1_3            

               (D) \small a_1_1A_1_1+a_2_1A_2_1+a_3_1A_3_1

Answers (1)

best_answer

Answer is (D) \small a_1_1A_1_1+a_2_1A_2_1+a_3_1A_3_1 by the definition itself, \small \Delta is equal to the product of the elements of the row/column with their corresponding cofactors.

 

Posted by

Divya Prakash Singh

View full answer

Crack CUET with india's "Best Teachers"

  • HD Video Lectures
  • Unlimited Mock Tests
  • Faculty Support
cuet_ads

Similar Questions

Trending Articles/News

anam-khan

CBSE announces STEM education as annual training theme for 2025
anam-khan

Board Exam 2025 Admit Card LIVE: WBBSE, UPMSP hall tickets soon; updates on other state boards admit cards
anam-khan

CBSE Class 10, 12 admit card 2025 out for regular, private students at Pariksha Sangam portal

Latest Question