Answers

(1)
f(n)=f(n-1)+f(n-2) なので、
f(1)=1,f(2)=2 より、
f(3)=f(1)+f(2)=3
(2)
同様に、
f(4)=2+3=5
f(5)=3+5=8
f(6)=5+8=13

f(n)の式は、適宜お求め下さい。

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