Check sibling questions
Class 12
Solutions of Sample Papers and Past Year Papers - for Class 12 Boards

Given that A is a square matrix of order 3Γ—3 and |A| = Β -4. Find |adj A|

Given that A is square matrix of order 3Γ—3 and |A| = - 4. Find |adj A|

Β 


Transcript

Question 5 (Choice 2) Given that A is a square matrix of order 3 Γ— 3 and |A| = βˆ’4. Find |adj A| We know that |𝒂𝒅𝒋 𝑨| = |𝑨|^(π’βˆ’πŸ) where n is the order of determinant Given Order = n = 3 So, |π‘Žπ‘‘π‘— 𝐴| = |A|^(3βˆ’1) |π‘Žπ‘‘π‘— 𝐴| = |A|^2 |π‘Žπ‘‘π‘— 𝐴| = (βˆ’4)2 |𝒂𝒅𝒋 𝑨| = 16

Davneet Singh's photo - Teacher, Engineer, Marketer

Made by

Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.