Mathematics · important
Two middle terms in \((x+a)^n\) for JEE
General term and middle term and simple applications
Formula
\[\text{For odd }n,\; T_{\frac{n+1}{2}}={n\choose \frac{n-1}{2}}x^{\frac{n+1}{2}}a^{\frac{n-1}{2}},\qquad T_{\frac{n+3}{2}}={n\choose \frac{n+1}{2}}x^{\frac{n-1}{2}}a^{\frac{n+1}{2}}\]
Variables: \(n\) is an odd positive integer.
Direct evaluation of two middle terms.