matlab 编程求极限的问题,y(n)=0.5[y(n-1)+a/y(n-1)],

matlab 编程求极限的问题,y(n)=0.5[y(n-1)+a/y(n-1)],
y(n)=0.5[y(n-1)+a/y(n-1)],初始情况y(-1)=1,y(0)=0.5,a>0;
编程验证：当n趋于无穷大时,y(n)趋于根号下a

a=linspace(1,10,10); %取10个整数a依次验证
for i=1:10
y(1)=1;
y(2)=0.5;
n=3;
delta=abs(y(2)-y(1));
while(delta>eps) % 判断相邻两次y值得接近程度,若delta