NCERT Solutions for Class 12 Maths Chapter 3 Exercise 3.2 Matrices in Hindi Medium as well as English Medium free for CBSE & UP Board students following CBSE Syllabus 2018-19. Download (Exercise 3.2) in PDF format to use offline also.

## NCERT Solutions for Class 12 Maths Chapter 3 Exercise 3.2

### Class 12 Maths Chapter 3 Exercise 3.2 Matrices Solutions in English

NCERT Solutions for Class 12 Maths Chapter 3 Exercise 3.2 Matrices English Medium to use online or download from the link given at the top of the page. Get here all the exercises of Class 12 Mathematics Chapter 3, If you need Solutions in Hindi, CLICK HERE for Hindi Medium Solutions.

### Class 12 Maths Chapter 3 Exercise 3.2 Matrices Solutions in Hindi

NCERT Solutions for Class 12 Maths Chapter 3 Exercise 3.2 Matrices in Hindi Medium. These solutions are updated for the students who are preparing for CBSE Examination March 2018-19. Get here all the exercises of Class 12 Mathematics Chapter 3, Go back to English Medium Solutions.

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#### Extra Important Questions for Practice

- If A is a square matrix such that A² = I, then write the value of (A – I)³ + (A + I)³ – 7A in the simplest form.
- Give an example of (i) a row matrix which is also a column matrix. (ii) a diagonal matrix which is not scalar and (iii) a triangular matrix.
- If A is a 3×3 matrix, |A| ≠ 0 and |3A| = k |A|, then write the value of k. [Answer: k = 27]
- The sales figure of two car dealers during January 2017 showed that dealer A sold 5 deluxe, 3 premium and 4 standard cars, while dealer B sold 7 deluxe, 2 premium and 3 standard cars. Total sales over the 2 month period of January – February revealed that dealer A sold 8 deluxe, 7 premium and 6 standard cars. In the same 2 month period, dealer B sold 10 deluxe, 5 premium and 7 standard cars. Write 2×3 matrices summarizing sales data for January and 2 – month period for each dealer.
- If A is a square matrix, expressed as A = X + Y where X is symmetric and Y is skew-symmetric, then write the values of X and Y. [Answer: X = ½ (A + A’) and Y = ½ (A – A’)]
- Write a matrix of order 3×3 which is both symmetric and skew symmetric matrix. [Answer: Zero matrix]
- If A and B are square matrices of order 3 and |A| = 5 and |B| = 3, then find the value of |3AB|. [Answer: 405]

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