the sum of the series `1/(log_2 4)+1/(log_4 4)+1/(log_8 4)+.............+1/(log_2^n 4)`

The sum of the series: (1)/(log_(2)4)+(1)/(log_(4)4)+(1)/(log_(8)4)+...+(1)/(log_(2n)4) is (n(n+1))/(2) (b) (n(n+1)(2n+1))/(12) (c) (n(n+1))/(4) (d) none of these

The sum of the series: 1/((log)_2 4)+1/((log)_4 4)+1/((log)_8 4)++1/((log)_(2n)4) is (n(n+1))/2 (b) (n(n+1)(2n+1))/(12) (c) (n(n+1))/4 (d) none of these

The sum of the series (1)/( log_(2) 4) + (1)/( log_(4) 4) + (1)/( log_(8) 4) + …... + (1)/( log_(2) 4) is

The sum of the series log_(4)2-log_(8)2+log_(16)2-.... is

Series (1)/(log_(2)^(2)) + (1)/(log_(4)^(4)) + (1)/(log_(8)^(4)) + …..+ (1)/(log_(2^(n))4) =……….

If n=(2017)! , then what is (1)/(log_(2)n)+(1)/(log_(3)n)+(1)/(log_(4)n)+....+(1)/(log_(2017)n) equal to?