# Write the first five terms of each of the sequences in Exercises 11 to 13 and obtain the corresponding series: a_{1} = - 1, a_{n} = a_{n - 1 }/ n; n ≥ 2

**Solution:**

a_{1} = - 1, a_{n} = a_{n - 1 }/ n

for all n ≥ 2

a_{2} = a_{1 }/ 2 = - 1/2

a_{3} = a_{2 }/ 3 = - 1/6

a_{4} = a_{3 }/ 4 = - 1/24

a_{5} = a_{4 }/ 5 = - 1/120

Hence, the first five terms of the sequence are - 1, - 1/2, - 1/6, - 1/24, - 1/120.

The corresponding series is (- 1) + (- 1/2) + (- 1/6) + (- 1/24) + (- 1/120) .....

NCERT Solutions Class 11 Maths Chapter 9 Exercise 9.1 Question 12

## Write the first five terms of each of the sequences in Exercises 11 to 13 and obtain the corresponding series: a_{1} = - 1, a_{n} = a_{n - 1 }/ n ; n ≥ 2.

**Summary:**

The first five terms of the sequence where a_{1} = - 1, a_{n} = a_{n - 1 }/ n for all n ≥ 2 are - 1, - 1/2, - 1/6, - 1/24, - 1/120

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