( \frac{(n+3)!}{(n+1)!} ) का सही विस्तार कौन सा है?
Which is the correct expansion of ( \frac{(n+3)!}{(n+1)!} )?
Explanation opens after your attempt
A. ( (n+3)(n+2) )
Concept
((n+3)!=(n+3)(n+2)(n+1)!), so two factors remain. Expand only up to the denominator factorial.
Why this answer is correct
The correct answer is A. ( (n+3)(n+2) ). ((n+3)!=(n+3)(n+2)(n+1)!), so two factors remain. Expand only up to the denominator factorial.
Exam Tip
((n+3)!=(n+3)(n+2)(n+1)!), इसलिए दो गुणक बचते हैं। नीचे वाले फैक्टोरियल तक ही विस्तार करें।
Login to save your score, XP, coins and progress.
