( \frac{(2n)!}{(2n-3)!} ) का सही विस्तार कौन सा है?
Which is the correct expansion of ( \frac{(2n)!}{(2n-3)!} )?
Explanation opens after your attempt
Correct Answer
C. ( (2n)(2n-1)(2n-2) )
Concept
We expand ((2n)!) up to ((2n)(2n-1)(2n-2)(2n-3)!). Therefore, three factors remain.
Why this answer is correct
The correct answer is C. ( (2n)(2n-1)(2n-2) ). We expand ((2n)!) up to ((2n)(2n-1)(2n-2)(2n-3)!). Therefore, three factors remain.
Exam Tip
((2n)!) को ((2n)(2n-1)(2n-2)(2n-3)!) तक फैलाते हैं। इसलिए तीन गुणक शेष रहते हैं।
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