# NCERT Solutions class-11 Maths Exercise 9.4

## myCBSEguide App

CBSE, NCERT, JEE Main, NEET-UG, NDA, Exam Papers, Question Bank, NCERT Solutions, Exemplars, Revision Notes, Free Videos, MCQ Tests & more.

Exercise 9.4

Find the sum to terms in each of the series in Exercises 1 to 7.

1.

Ans. Given:to terms

= [ term of 1, 2, 3, ………..][ term of 2, 3, 4, 5, ………]

=

=

=

=

=

=

=

=

=

2.

Ans. Given: to terms

= [ term of 1, 2, 3, ………..][ term of 2, 3, 4, 5, ………][ term of 3, 4, 5, ………]

=

=

=

=

=

=

=

=

=

=

=

3.

Ans. Given: to terms

= [ term of 3, 5, 7, ………..][ term of 1, 2, 3, 4, ………]2

= =

=

=

=

=

=

=

=

=

=

4.

Ans. Given: to terms

=

= = [By partial fraction]

………

And

= =

5.

Ans. Given:

=

=

=

=

= = 2840

6.

Ans. Given: to terms

= [ term of 3, 6, 9, ………..][ term of 8, 11, 14, ………..]

=

= =

=

=

=

=

=

=

=

7.

Ans. Given: to terms

=

=

=

=

=

=

=

=

=

=

=

Find the sum to terms in each of the series in Exercises 8 to 10 whose terms is given by

8.

Ans. Given:

=

=

=

=

=

=

=

=

9.

Ans. Given:

=

=

=

=

=

10.

Ans. Given:

=

=

=

=

=

=

=

=

### 5 thoughts on “NCERT Solutions class-11 Maths Exercise 9.4”

1. Its very useful for students

2. This was very helpful for me

3. It is best,
because it helped

4. It is best,
because it helped

5. Really nice