\( \left\{1-\left(\frac{1}{2}\right)\right\}\left\{1-\left(\frac{1}{3}\right)\right\}\left\{1-\l....

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\( \left\{1-\left(\frac{1}{2}\right)\right\}\left\{1-\left(\frac{1}{3}\right)\right\}\left\{1-\left(\frac{1}{4}\right)\right\} \ldots \ldots\left\{1-\left(\frac{1}{n+1}\right)\right\}= \)
\( \mathrm{P} \)
(1) \( \frac{1}{n+1} \) for all \( n \in N \)
(2) \( \frac{1}{n+1} \) for all \( n \in R \)
(3) \( \frac{1}{n+1} \) for all \( n \in N \)
(4) \( \frac{1}{n+1} \) for all \( n \in R \)


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