public class Text20 { //分析:抓住分子与分母的变化规律。 分子分母都是斐波那契数列,递推公式的得出较为简单 public static void main(String[] args) { float fenmu=1;float fenzi=2; float sum=fenzi/fenmu; float t=0; for(int i=1;i<20;i++) { t=fenmu+fenzi; fenmu=fenzi; fenzi=t; sum=sum+fenzi/fenmu; System.out.println(sum); } } }
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