√7√7√7√7√7⋯\sqrt{7\sqrt{7\sqrt{7\sqrt{7\sqrt{7\cdots}}}}} approximation [closed]

Is there any trick to evaluate this or this is an approximation, I mean I am not allowed to use calculator.

77777

Answer

77777…=712714718=712+14+18+=712112=7

Attribution
Source : Link , Question Author : user2378 , Answer Author : Madrit Zhaku

Leave a Comment