मान लीजिए ${ }^{n} C_{r}$ व्यंजक $(1+ x )^{ n }$ में $x^{r}$ का द्विपद गुणांक दर्शाता है। यदि $\sum_{ k =0}^{10}\left(2^{2}+3 k \right){ }^{10} C _{ k }=\alpha \cdot 3^{10}+\beta \cdot 2^{10},$ जहाँ $\alpha, \beta \in R,$ है,तो $\alpha+\beta$ का मान ....... है।

  • A
    $19$
  • B
    $21$
  • C
    $17$
  • D
    $13$

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