Which of the following is true for \( n \in N \) ?
\( \mathrm{P} \)... VIDEO
Which of the following is true for \( n \in N \) ?
\( \mathrm{P} \)
(1) \( \frac{1}{2}+\frac{1}{4}+\frac{1}{8}+\ldots .+\frac{1}{2^{n}}1 \)
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(2) \( \frac{1}{n+1}+\frac{1}{n+2}+\ldots \ldots+\frac{1}{3 n+1}1 \)
(3) \( n^{4}10^{n} \)
(4) \( { }^{2 n} C_{n}\frac{4^{n}}{n+1} \)
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