Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  CBSE XII  >>  Math  >>  Model Papers
0 votes

If A is square matrix of order 3 such that | adj.A |=81, find | A |.

Can you answer this question?

1 Answer

0 votes
|adjA|^n=|A|^n-1 Given |adjA|=81 81=3^4 Hence |A| =3^3=27 Therefore|A|=27
answered Nov 30, 2013 by vijayalakshmi_ramakrishnans
i think the answer is 9.check it out!
Ask Question
student study plans
JEE MAIN, CBSE, AIPMT Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App