MCQ
${\left( {x - \frac{3}{{{x^2}}}} \right)^9}$ ના વિસ્તરણમાં અચળપદ મેળવો.
- Aઅસ્તિત્વ નથી.
- B$^9{C_2}$
- C$2268$
- ✓$-2268$
= $^9{C_r}{( - 3)^r}{(x)^{9 - 3r}}$
For term independent of $x$, $9 - 3r = 0 \Rightarrow r = 3$
${T_4} = {\,^9}{C_3}\,{( - 3)^3} = - 2268$.
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