Is there any trick to evaluate this or this is an approximation, I mean I am not allowed to use calculator.
√7√7√7√7√7⋯
Answer
√7√7√7√7√7…=712⋅714⋅718⋯=712+14+18+⋯=7121−12=7
Attribution
Source : Link , Question Author : user2378 , Answer Author : Madrit Zhaku