Check sibling questions

If A is a square matrix of order 3, |A′|=-3, then |AA′|=

(a) 9  

(b) -9  

(c) 3  

(d) -3

 

 


Transcript

Question 2 If A is a square matrix of order 3, |𝐴′|=−3, then |𝐴𝐴′|= (a) 9 (b) -9 (c) 3 (d) -3We know that |𝑨′|=|𝐀|= −3 Now, |𝑨𝑨′|=|𝐴| ×|𝐴^′ | = −3 × −3 = 9 So, the correct answer is (a)

  1. Class 12
  2. Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

About the Author

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo