If A = [3, 1   -1, 2], show that A 2 − 5A + 7I = O. Hence find A −1 .

 

This question is exactly same as Ex 4.5, 13 of Chapter 4 Class 12 in the NCERT Book.

Please check the answer and video here

https://www.teachoo.com/3250/692/Ex-4.5--13---Show-that-A2---5A---7I--O.-Hence-find-A-1/category/Ex-4.5/

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

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.