Q10 of 45 Page 1

If A is an invertible matrix of order 3 and
|A|= 5, then find |adj.A|.

We know that,


|adj.A| = |A|n-1


Where, n is order of matrix


Given, |A| = 5, n = 3


⇒ |adj.A| = 52


= 25


More from this chapter

All 45 →
8

Iffind the value of k.

 9

If the binary operation * on the set of integers Z, is defined by a *b = a + 3b2, then find the value of 2 * 4.

 11

If and show that is parallel to where and

12

Prove that:


OR


Solve for x :