The sum of n terms of the series $1 / (1^{} 2) + 1 / (2^{} 3) + 1 / (3^{} 4) + 1 / (4^{} 5) + . . . . . .$

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Solution

The correct option is B

$1 - (1 / 2) + (1 / 2) - (1 / 3) + . . . . . + 1 / (n - 1) - 1 / (n) = (n - 1) / n$

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