Q1 of 45 Page 1

If for any 2 × 2 square matrix A, then write the value of |A|.

We have-


and we know that-


A(adj A) =|A|In ...(2)


Comparing (1) and (2), we get-


|A| = 8


Hence, the value of |A| is 8.


More from this chapter

All 45 →
2

Determine the value of ‘k’ for which the following function is continuous at x = 3:

 3

Find:

4

Find the distance between the planes 2x – y + 2z = 5 and 5x – 2.5y + 5z = 20.

 5

If A is a skew-symmetric matrix of order 3, then prove that det A = 0.