Question 9
What is the sum of the first 39 numbers in the sequence below?
2, 0, 2, 1, 2, 0, 2, 1, 2, 0, 2, 1, …
Self-study rule (editorial): repeat the four-term block 2, 0, 2, 1 throughout.
2, 0, 2, 1, 2, 0, 2, 1, 2, 0, 2, 1, …
Self-study rule (editorial): repeat the four-term block 2, 0, 2, 1 throughout.