MCQ
${\left( {x + \frac{1}{{2x}}} \right)^{2n}}$ ના વિસ્તરણમાં મધ્યમપદ મેળવો.
- A$\frac{{1.3.5....(2n - 3)}}{{n!}}$
- ✓$\frac{{1.3.5....(2n - 1)}}{{n!}}$
- C$\frac{{1.3.5....(2n + 1)}}{{n!}}$
- Dએકપણ નહીં.
$ = \frac{{2n!}}{{n!.n!{{.2}^n}}} = \frac{{1.3.5....(2n - 1)}}{{n!}}$.
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(જ્યાં $i$ =$\sqrt { - 1}$ )