# NCERT Class 12-Mathematics: Exemplar Chapter –3 Matrices Part 15

Doorsteptutor material for CBSE is prepared by world's top subject experts: fully solved questions with step-by-step explanation- practice your way to success.

Download PDF of This Page (Size: 122K) ↧

**Question 40:**

If then find . Hence, obtain

**Answer:**

We have,

Now,

[Using Eq. (i) and (ii)]

**Question 41:**

Find the values of and , if

**Answer:**

We have,

And

**Question 42:**

Find the matrix A such that

**Answer:**

We have,

From the given equation, it is clear that order of A should be

Let

By equality of matrices, we get

And

**Question 43:**

If find ,

**Answer:**

We have,