જો $f^{\prime \prime}(0)=k, k \neq 0,$ હોય, તો $\lim _{x \rightarrow 0} \frac{2 f(x)-3 f(2 x)+f(4 x)}{x^{2}}$ ની કિંમત શું થાય?

  • A
    $k$
  • B
    $2 k$
  • C
    $3 k$
  • D
    $4 k$

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