$a \in R, |a| > 1$ માટે,ધારો કે $\lim _{n \rightarrow \infty} \left( \frac{1+\sqrt[3]{2}+\ldots+\sqrt[3]{n}}{n^{7/3} \left( \frac{1}{(an+1)^2} + \frac{1}{(an+2)^2} + \ldots + \frac{1}{(an+n)^2} \right)} \right) = 54$. તો $a$ ની શક્ય કિંમત(ઓ) શોધો:
$(1) 8$ $(2) -9$ $(3) -6$ $(4) 7$

  • A
    $1, 2$
  • B
    $1, 3$
  • C
    $1, 4$
  • D
    $2, 3$

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