How do you find the partial sum of Sigma 7n from n=51 to 100? Calculus Introduction to Integration Sigma Notation 1 Answer Cem Sentin Nov 5, 2017 x=7*(51+52+...+100)=26425 Explanation: x=7*(51+52+...+100) =7*(100*101)/2-7*(50*51)/2 =7*(5050-1275) =7*3775 =26425 Answer link Related questions How does sigma notation work? How do you use sigma notation to represent the series 1/2+1/4+1/8+…? Use summation notation to express the sum? What is sigma notation for an arithmetic series with first term a and common difference d ? How do you evaluate the sum represented by sum_(n=1)^5n/(2n+1) ? How do you evaluate the sum represented by sum_(n=1)^(8)1/(n+1) ? How do you evaluate the sum represented by sum_(n=1)^(10)n^2 ? What is sigma notation for a geometric series with first term a and common ratio r ? What is the value of 1/n sum_{k=1}^n e^{k/n} ? Question #07873 See all questions in Sigma Notation Impact of this question 3368 views around the world You can reuse this answer Creative Commons License