What is the sum of the first 10 terms of an arithmetic series if its first term is 3
and last term is 21?
A. 60 B. 96 C. 120 D. 260
Share
What is the sum of the first 10 terms of an arithmetic series if its first term is 3
and last term is 21?
A. 60 B. 96 C. 120 D. 260
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Answer: 120
Step-by-step explanation:
Verified answer
C.120
sn=n/2(a1+an)
=10/2(3+21)
=5(24)
Sn=120