In an AP, Sum of the 2nd and 30th terms is 50. a) Find the sum of 5th and 27th terms b) Find the 16th term c) Find the sum of first 31 terms
Answers
Answered by
0
Answer:
Suppose a sequence of numbers is arithmetic (that is, it increases or decreases by a constant amount each term), and you want to find the sum of the first n terms.
Denote this partial sum by Sn . Then
Sn=n(a1 + an)2 ,
where n is the number of terms, a1 is the first term and an is the last term.
The sum of the first n terms of an arithmetic sequence is called an arithmetic series .
Similar questions