Matrices and Determinants | Lesson 1 | Exercise 1 | GU B.com 4th Sem Business Mathematics Solution Assam | GU B.com 4th Semester Business Mathematics Solution English Medium |

Lesson 1

Matrices and Determinants

Exercise 1

1. Find the matrices A + B, A - 2B from the following

3. Find the matrices A and B where 

8. Find the rank of the following matrices

9. Find the Inverse of the following matrices:

10. Solve the following system of equations by Matrix inversion Methodd:

(i) 2x - y + 2z = -8

x + 2y - 3z = 9

3x - y - 4z = 3

(ii) x + 2y - z = 2

3x - 4y + 2 = 1

-x + 3y - z = 3

(iii) 2x - 3y + z = 4

x - y + z = 6

3x + 4y - z = 19

(iv) x + y + z = 4

2x - y + 3z = 1

3x + 2y - z = 1

(v) 2x + y + z = 1

x - y + 2z = -1

3x + 2y - z = 4

(vi) x + 2y + 3z = 2

2x + 4y + 5z = 3

3x + 5y + 6z = 4

11. A Fruit seller buys 10 dozen of mangoes, 12 dozen of apples and 6 dozen of bananas. Mangoes cost Rs. 20 per dozen, Apples Rs. 10 per dozen and Bananas Rs. 8 per dozen. Obtain the total cost by using matrix notation.

Solution;

Let, the total cost is A

∴ Total cost of the fruit is (A) = Rs. 368 

- Hiru Moni Bora

Post ID :DABP003790