यदि \(^{n}C_{r}=^{n}C_{r+1}\) है, तो (n) और (r) के बीच संबंध क्या है?
If \(^{n}C_{r}=^{n}C_{r+1}\), what is the relation between (n) and (r)?
Explanation opens after your attempt
Correct Answer
B. (n=2r+1)
Concept
For equality, complementary indices add to (n). Thus (r+(r+1)=n), so (n=2r+1).
Why this answer is correct
The correct answer is B. (n=2r+1). For equality, complementary indices add to (n). Thus (r+(r+1)=n), so (n=2r+1).
Exam Tip
समानता में पूरक सूचकांक का योग (n) है। इसलिए (r+(r+1)=n), अतः (n=2r+1)।
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