( \frac{(2n)!}{(2n-2)!} ) किसके बराबर है?
What is ( \frac{(2n)!}{(2n-2)!} ) equal to?
Explanation opens after your attempt
Correct Answer
B. (2n(2n-1))
Concept
((2n)!=(2n)(2n-1)(2n-2)!), so the answer is (2n(2n-1)). Apply the same factorial rule to indexed terms.
Why this answer is correct
The correct answer is B. (2n(2n-1)). ((2n)!=(2n)(2n-1)(2n-2)!), so the answer is (2n(2n-1)). Apply the same factorial rule to indexed terms.
Exam Tip
((2n)!=(2n)(2n-1)(2n-2)!), इसलिए उत्तर (2n(2n-1)) है। सूचक में भी वही फैक्टोरियल नियम लगाएं।
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