Question

If the sum of the 5th term and the
15th term of an A.P. is 18, then
which of the following statements
is DEFINITELY TRUE?

1)
The first term of the A.P. is O and its
common difference is 1
2)
The first term of the A.P. is 9 and its
common difference is 0
3)
The sum of the first 19 terms of the
A.P. is 171
4)
The sum of the first 18 terms of the
A.P. is 162​

Answer 1

Answer:

4)

Step-by-step explanation:

the difference between c.i. and s.i. on certain sum of money for 2 year is 1.50. find the sum