Limit problem involving a double factorial

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SUMMARY

The limit problem involving a double factorial is expressed as $$ \lim_{n\rightarrow \infty }n\cdot\left ( \frac{2\cdot4\cdot6 \cdots (2n-2)}{1\cdot3\cdot5\cdots (2n-1)} \right )^{2}$$. To solve this limit, it is essential to analyze the ratio of two consecutive terms in the sequence. This approach allows for simplification and ultimately leads to the determination of the limit as \( n \) approaches infinity.

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  • Knowledge of sequences and series
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Homework Statement



Solve the following limit:
$$ \lim_{n\rightarrow \infty }n\cdot\left ( \frac{2\cdot4\cdot6 \cdots (2n-2)}{1\cdot3\cdot5\cdots (2n-1)} \right )^{2}$$

The Attempt at a Solution



I don't know where to begin. Until know I've encountered limits which I could deal with in some way but this is new for me. Any tips?

Thank you for your time.
 
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Consider the ratio of two consecutive terms.
 

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