((1+x)^n) में \(x^r\) का coefficient \(^{n}C_r\) क्यों होता है?
Why is the coefficient of \(x^r\) in ((1+x)^n) equal to \(^{n}C_r\)?
Explanation opens after your attempt
Correct Answer
A. क्योंकि (r) brackets से (x) और बाकी से (1) चुनते हैंBecause (x) is chosen from (r) brackets and (1) from the rest
Concept
To form \(x^r\), choose (r) brackets from (n) brackets. In exams connect coefficients with selection.
Why this answer is correct
The correct answer is A. क्योंकि (r) brackets से (x) और बाकी से (1) चुनते हैं / Because (x) is chosen from (r) brackets and (1) from the rest. To form \(x^r\), choose (r) brackets from (n) brackets. In exams connect coefficients with selection.
Exam Tip
\(x^r\) बनाने के लिए (n) brackets में से (r) brackets चुनते हैं। परीक्षा में coefficient को selection से जोड़ें।
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