7 廣義費氏數列（Fibonacci numbers）定義如下：F(0)=0, F(1)=1, F(i) = F(i-l) +2F(i-2) for i >1， F(10)為何？
(A) 251
(B) 266
(C) 279
(D) 341

答案：登入後觀看
難度： 非常簡單

	1F Alovoe Ho (2019/01/10) F(2)=F(1)+2F(0)=1 F(3)=F(2)+2F(1)=3 F(4)=F(3)+2F(2)=5 F(5)=F(4)+2F(3)=11 F(6)=F(5)+2F(4)=21 F(7)=F(6)+2F(5)=43 F(8)=F(7)+2F(6)=85 F(9)=F(8)+2F(7)=171 F(10)=F(9)+2F(8)=341 檢舉
	2F Lin Tony 大四下 (2021/06/05) F(0) = 0 F(1) = 1 F(2) = 1 + 0 F(3) = F(2) + 2F(1) = 1 + 2 = 3 F(4) = F(3) + 2F(2) = 3 + 2 = 5 F(5) = F(4) + 2F(3) = 5 + 6 = 11 F(6) = F(5) + 2F(4) = 11 + 10 = 21 F(7) = F(6) + 2F(5) = 21 + 22 = 43 F(8) = F(7) + 2F(6) = 43 + 42 = 85 F(9) = F(8) + 2F(7) = 85 + 86 = 171 F(10) = F(9) + 2F(8) = 171 + 170 = 341 檢舉

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