Use summation notation to express the sum? Calculus Introduction to Integration Sigma Notation 1 Answer Wataru Nov 3, 2014 a1+a2+a3+⋯+an=n∑i=1ai I hope that this was helpful. Answer link Related questions How does sigma notation work? How do you use sigma notation to represent the series 12+14+18+…? What is sigma notation for an arithmetic series with first term a and common difference d ? How do you evaluate the sum represented by 5∑n=1n2n+1 ? How do you evaluate the sum represented by 8∑n=11n+1 ? How do you evaluate the sum represented by 10∑n=1n2 ? What is sigma notation for a geometric series with first term a and common ratio r ? What is the value of 1nn∑k=1ekn ? Question #07873 Question #117a3 See all questions in Sigma Notation Impact of this question 4933 views around the world You can reuse this answer Creative Commons License