Prove that the sum of 'n' terms of an A.P., whose 1st term is 'a' and common difference is 'd' is given by Sn= n/2[2a+(n-1)d]
Answers
Answered by
2
the nth term of A.P is a+(n-1)d.Let s denote first n terms and reverse it and solve two equations
Attachments:
prem134:
its ok
Similar questions
Chemistry,
7 months ago
Computer Science,
7 months ago
Math,
7 months ago
English,
1 year ago
English,
1 year ago
Political Science,
1 year ago