Question

the sum of the first and 15th terms of an arithmetic sequence is 60?what is the sum of 7th and 9th terms​

Answer 1

Answer:

a+a+14d=60

2(a+7d) =60

a+7d=30

=a+6d+a+8d

=2a+14d

=2(a+7d)

=2(30) =60

so, sum of 7th term and 9th term also 60

hope it's helpful mark as brainlest