MCQ
${\left( {\sqrt x - \frac{2}{x}} \right)^{18}}$ ના વિસ્તરણમાં અચળપદ મેળવો.
- ✓$^{18}{C_6}{2^6}$
- B$^{18}{C_6}{2^{12}}$
- C$^{18}{C_{18}}{2^{18}}$
- Dએકપણ નહીં.
If ${T_{r + 1}}$ is independent of $x$, then $9 - \frac{r}{2} - r = 0 \Rightarrow r = 6$.
So term independent of $x = {T_7} = {\,^{18}}{C_6}{2^6}$
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