1.

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

Answer»

`(1)/(2) n (n+1) `
`(1)/(12) n ( n+1) (2n+1)`
`(1)/( n(n+1) )`
` (n (n+1))/4`

ANSWER :D


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