Question

Please solve this question
class 12
maths
chapter:- Expansion of Determinant​

Answer 1

Answer:

We know that, |adj (A)| = ∣A∣

n−1

, where n is order of determinant.

Therefore,

∣adj(A)∣=∣1∣

2−1

∣adj(A)∣=1

Step-by-step explanation:

Hope it helps you ARMY

Borahea

Answer 2

Given, A=[ 5/7 2/3]

therefore,

|A| = | 5/ 7 2/ 3| = 15- 14 = 1

We know that, |adj (A)| = ∣A∣ ^n -1 , where n is order of determinant.

therefore

| adj(A) | = | 1 | ^2-1

| adj (A) | = 1

hope its help u

borahae ❤️