यदि $\mathop {Lim}\limits_{x \to 0} (x^{-3} \sin 3x + ax^{-2} + b)$ का अस्तित्व है और यह शून्य के बराबर है,तो:

  • A
    $a = -3, b = 9/2$
  • B
    $a = 3, b = 9/2$
  • C
    $a = -3, b = -9/2$
  • D
    $a = 3, b = -9/2$

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यदि $f(x) = \begin{cases} 3ax - 2b, & x > 1 \\ ax + b + 1, & x < 1 \end{cases}$ और $\lim_{x \rightarrow 1} f(x)$ का अस्तित्व है,तो $a$ और $b$ के बीच संबंध क्या है?

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