Question

Example 8. If the sum of 1st m terms of an A.P. vanishes ; show that the sum of next
- an (m + n)
n terms is
where a is the first term.
m - 1​

Answer 1

Answer:

general term of an A.P. with first term a and common difference d is given by,

a

n

=a+(n−1)d

Here given a=3,d=4

So, a

n

=3+(n−1)4=4n−1

Thus a

2

=4(2)−1=7

and a

3

=4(3)−1=11

Hence the next two terms of the A.P. are 7 and 11