(\frac{(n+3)!}{n!}) का पूर्ण विस्तार कौन सा है?
Which is the complete expansion of (\frac{(n+3)!}{n!})?
Explanation opens after your attempt
C. ((n+3)(n+2)(n+1))
Concept
((n+3)!=(n+3)(n+2)(n+1)n!). After canceling (n!), three factors remain.
Why this answer is correct
The correct answer is C. ((n+3)(n+2)(n+1)). ((n+3)!=(n+3)(n+2)(n+1)n!). After canceling (n!), three factors remain.
Exam Tip
((n+3)!=(n+3)(n+2)(n+1)n!) होता है। इसलिए (n!) कटने पर तीन गुणनखंड बचते हैं।
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