the 7th term of an A.P. is -4 and its 13th term is -16. find the sum of its first 19 terms
Answers
Answered by
1
-238.75
I hope according to the formula sn =n/2(2a+n-1)(d)
I hope according to the formula sn =n/2(2a+n-1)(d)
Answered by
0
I hope this will help!
Similar questions