मान लीजिए $f(x) = 3x^{10} - 7x^{8} + 5x^{6} - 21x^{3} + 3x^{2} - 7$. तो $\lim_{h \rightarrow 0} \frac{f(1-h) - f(1)}{h^{3} + 3h}$ है:

  • A
    अस्तित्व में नहीं है
  • B
    $\frac{50}{3}$ है
  • C
    $\frac{53}{3}$ है
  • D
    $\frac{22}{3}$ है

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