Find the value of the sum of k^2 for k = 1 to 8.
Answer and explanation
Correct answer: A. 204
- Step 1: Use the formula sum k^2 = n(n + 1)(2n + 1)/6. Step 2. = 8 x 9 x 17 / 6 = 204. Answer: 204. Why not the others: 36: That is the sum of the first 8 integers, not of their squares. 1296: That is the sum of cubes. 64: That is n squared, which is the sum of odd numbers.
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