Maharashtra Board Class 11 Maths Part 1 Chapter 4 Determinants and Matrices Ex 4.1 Solution

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.