Answer :

Formula used.

S_{n} = [2a + (n–1)d]

d = a_{n + 1}–a_{n}

In the following A.P

a = ,

d = a_{2}–a_{1}

= = 1;

n = 18

S_{n} = [2a + (n–1)d]

= [2× + (18–1)1]

= 9[ + 17]

= 9[]

= 159

Rate this question :

How useful is this solution?

We strive to provide quality solutions. Please rate us to serve you better.

Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Expertsview all courses

Dedicated counsellor for each student

24X7 Doubt Resolution

Daily Report Card

Detailed Performance Evaluation

RELATED QUESTIONS :

Find the sum of aGujarat Board Mathematics

Find the sum of aGujarat Board Mathematics

The ratio of the Gujarat Board Mathematics

If T_{n} Gujarat Board Mathematics

If the sum of theGujarat Board Mathematics

Sum to first l, mGujarat Board Mathematics

Find the sum of aGujarat Board Mathematics

If S_{n} Gujarat Board Mathematics

How many terms ofGujarat Board Mathematics

The sum of first Gujarat Board Mathematics