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# In the matrix \( \begin{bmatrix} 2 & 5 & 19 & -7 \\ 35 & -2 & \frac{5}{2} & 12 \\ \sqrt{3}& 1 & -5 & 17 \end{bmatrix}\), write:

(i) The order of the matrix

(ii) The number of elements

(iii) Write the elements a_{13}, a_{21}, a_{33}, a_{24}, a_{23}

**Steps:**

(i) Since, in the given matrix, the number of rows is 3 and the number of columns is 4,

the order of the matrix is 3 × 4.

(ii) Since the order of the matrix is 3 × 4,

there are 3 × 4 = 12 elements.

(iii) Here,

a_{13} = 19

a_{21} = 35

a_{33} = -5

a_{24} = 12

a_{23} = 5/2

NCERT Solutions for Class 12 Maths - Chapter 3 Exercise 3.1 Question 1

## In the matrix \( \begin{bmatrix} 2 & 5 & 19 & -7 \\ 35 & -2 & \frac{5}{2} & 12 \\ \sqrt{3}& 1 & -5 & 17 \end{bmatrix}\), write: (i) The order of the matrix (ii) The number of elements (iii) Write the elements a_{13}, a_{21}, a_{33}, a_{24}, a_{23}

**Summary:**

For the given matrix, the order of the matrix is 3 × 4, there are 3 × 4 = 12 elements.a_{13} = 19 a_{21} = 35 a_{33} = -5 a_{24} = 12 a_{23} = 5/2

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