If n N and the coefficients of x –7 and x –8 to the expansion of (2+ 1 3 x )^ n are equal…
Mathematics · JEE Main · NTA Exams — Binomial Theorem And Its Simple Applications
If n \(\epsilon\)N and the coefficients of x–7 and x–8 to the expansion of \(\left(2+\frac{1}{3 x}\right)^{n}\)are equal then n =
- 56
- 15
- 45
- 55
Answer
(D) 55
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