Let n 5 and b 0 . In the binomial expansion of (a-b)^ n , the sum of the 5^ th and 6^ th…
Mathematics · JEE Main · NTA Exams — Binomial Theorem And Its Simple Applications
Let \(n \geqslant 5\) and \(b \neq 0\). In the binomial expansion of \((a-b)^{n}\), the sum of the \(5^{\text {th }}\) and \(6^{\text {th }}\) term is zero then \(\frac{a}{b}\) equals :
- \(\frac{5}{n-4}\)
- \(\frac{1}{5(n-4)}\)
- \(\frac{n-5}{6}\)
- \(\frac{n-4}{5}\)
Answer
(D) n-4 5
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