How to Use the SUM Function in Excel to Add Cells, Ranges, & Numbers

SOLVED:Evaluating a Sum In Exercises 25-28, use the summation formulas to rewrite the expression without the summation notation. Use the result to find the sums for n=10,100,1000, and 10,000 . ∑i=1^n (2 i 1)/(n^2)

Summation Formula (With Solved Example)