Tnensi1ow 1 ex. a 1+ +.+ n consider 1 a=1+ .* 1 2n-1 +1 1 1 1 1 = 1+- 2 3 + 456*78 +...+ 2 1+ 1(1 +..+ +.+ 2n -+...+ 2 4) = 1++2+22.1 23 +.+2" = 1+ 2 a14 vn>2 t

https://youtu.be/lmmH2SVCbTM see this video you understand batter. this proof based on Cauchy sequence https://youtu.be/8bbcMlOXllA