Sum even-valued terms in Fibonacci sequence
Project Euler 第二题
Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be:
1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...
Find the sum of all the even-valued terms in the sequence which do not exceed four million.
斐波那契数列(Fibonacci sequence)出自意大利数学家Leonardo Fibonacci 1202年出版的《算盘全书》。数列的最初两个数都是1，其后每个数都是前两个数之和。
解答过程见sum-fibonacci-sequence-not-exceed-four-million.py。
firstThink是我写的，相当垃圾，secondThink和thirdThink是参考帮助说明写的。
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- sum-fibonacci-sequence-not-exceed-four-million.py (1.3 KB)
- sum-even-valued-terms-in-fibonacci-sequence.pdf (6.6 KB)
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tags: Project Euler,python,智力题