Check sibling questions

Ex 4.1, 6 - Find determinant |A| if A = [1 1 -2 2 1 -3 5 4 -9]


Transcript

Ex 4.1, 6 If A = [■8(1&1&−[email protected]&1&−[email protected]&4&−9)], find |A| |A| = |■8(1&1&−[email protected]&1&−[email protected]&4&−9)| = 1 |■8(1&−[email protected]&−9)| – 1 |■8(2&−[email protected]&−9)| + (–2) |■8(2&[email protected]&4)| = 1 (1(–9) – 4(–3)) – 1 (2( –9) – 5(–3)) –2(2(4) – 5(1)) = 1 (−9 + 12) + 1 (−18 + 15) – 2 (8 – 5) = 1(3) − 1 (−3) – 2 (3) = 3 + 3 – 6 = 6 – 6 = 0 Hence, |A|= 0

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.