Tutorial Exercise 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. Step 1 M- 6i + 2 n i = 1 n 6i + 2 Using the summation formula the expression ---Select--- written as the expression without the 02 i = 1 summation notation. Therefore, n 6i +2 n i = 1 n = 3 + (61 + 2) i = 1 n 61 + n i = 1 n(n + 1) + 2 n