(i) E = n: ne N}

infimum is 1

it's value lies between 1 and 2

sometimes I omit continuity while differentiating (see eq.1) but this is true for all n>=1 real no. so also for some particular points also(i.e. point of natural number). the way ...

3 power one by three

1.....its limit point is 1.So,it's infimum and supremum is 1.(it's my opinion only frnd).