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The sum of the series 1/1.2 - 1/2.3 + 1/3.4 - ......upto ∞ is equal to

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The sum of the series 1/1.2 - 1/2.3 + 1/3.4 - ......upto ∞ is equal to

(a) loge2 – 1 

(b) loge2

(c) loge(4/e) 

(d) 2loge2.

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