यदि $f(a) = 2$,$f'(a) = 1$,$g(a) = -3$,$g'(a) = -1$ है,तो $\mathop {\lim }\limits_{x \to a} \,\frac{f(a)g(x) - f(x)g(a)}{x - a} = $

  • A
    $1$
  • B
    $6$
  • C
    $-5$
  • D
    $-1$

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यदि $\alpha_1, \alpha_2, \ldots, \alpha_n$,$x^n+px+q=0$ के मूल हैं,तो $(\alpha_n-\alpha_1)(\alpha_n-\alpha_2) \ldots (\alpha_n-\alpha_{n-1})=$

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