NCERT Solutions class 12 Maths Exercise 3.4

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NCERT Solutions class 12 Maths Matrices

Using elementary transformation, find the inverse of each of the matrices, if it exists in Exercises 1 to 6.

1.

Ans. Let A =

Since A = IA

=

2.

Ans. Let A =

Since A = IA

=

3.

Ans. Let A =

Since A = IA

=

4.

Ans. Let A =

Since A = IA

=

5.

Ans. Let A =

Since A = IA

=

6.

Ans. Let A =

Since A = IA

=

Using elementary transformation, find the inverse of each of the matrices, if it exists in Exercises 7 to 14.

7.

Ans. Let A =

Since A = IA

=

8.

Ans. Let A =

Since A = IA

=

9.

Ans. Let A =

Since A = IA

=

10.

Ans. Let A =

Since A = IA

=

11.

Ans. Let A =

Since A = IA

=

12.

Ans. Let A =

Since A = IA

Here, all entries in second row of left side are zero.

does not exist.

13.

Ans. Let A =

Since A = IA

=

14.

Ans. Let A =

Since A = IA

Here, all entries in second row of left side are zero.

does not exist.

Using elementary transformation, find the inverse of each of the matrices, if it exists in Exercises 7 to 14.

15.

Ans. Let A = , We know that A = IA,

16.

Ans. Let A = , Since, A = IA

=

17.

Ans. Let A = , Since, A = IA

=

18.  Matrices A and B will be inverse of each other only if:

(A) AB = BA

(B) AB = BA = 0

(C) AB = 0, BA = I

(D) AB = BA = I

Ans. By definition of inverse of square matrix,

Option (A) is correct.

NCERT Solutions class 12 Maths Exercise 3.4

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13 thoughts on “NCERT Solutions class 12 Maths Exercise 3.4”

1. Very nice

2. Most wonderful

3. Wonderful

4. Nice way to solve the question

5. what a way sir/madam of make us understsnd

6. bhai bhut.helpful thank fr making this site or page makers

7. Exercise 3.4 question number 16th answer is wrong?

8. There are some mistakes in the solution please make it correct it creates lot of confusion.

ex 3.4 question no. 16 is wrong.

9. Hello sir
Mathematics More eassy

10. Good

11. Every nice ?

12. sir ; maths is very eassy

13. thanku so much it is wonderful