证明X1=√2,X2=√(2+√2),X3=√(2+(2+√2)),...的极限存在并求出n趋向于∞时Xn

问题描述:

证明X1=√2,X2=√(2+√2),X3=√(2+(2+√2)),...的极限存在并求出n趋向于∞时Xn
错了 X3=√(2+√(2+√2)),...