Chapter 4 Determinants and Matrices Ex 4.1
Chapter 4 Determinants and Matrices Ex 4.1
Question 1.
Find the values of the determinants.
Question 2.
Question 3.
Solution:
Comparing with x + iy, we get x = 11, y = 52
Question 4.
Find the minors and cofactors of elements of the determinant D=
Question 5.
Solution: 
= 2(0 – 20) + 3(- 42 – 4) + 5(30 – 0) = 2(-20) + 3(- 46) + 5(30)
= 2(0 – 20) + 3(- 42 – 4) + 5(30 – 0) = 2(-20) + 3(- 46) + 5(30)
= -40-138+ 150 = -28 
Question 6.
