यदि $\frac{3x + a}{x^2 - 3x + 2} = \frac{A}{x - 2} - \frac{10}{x - 1}$ है,तो

  • A
    $a = 7$
  • B
    $a = -7$
  • C
    $A = 13$
  • D
    $(a)$ और $(c)$ दोनों

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$a > 0$ के लिए,मान लीजिए $\frac{1}{a(a+1)(a+2) \ldots(a+20)}=\sum_{k=0}^{20} \frac{A_{k}}{a+k}$. तब $100\left(\frac{A_{14}+A_{15}}{A_{13}}\right)^{2}$ का मान $....$ है।

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यदि $\frac{x^2}{2 x^4+7 x^2+6}=\frac{A x+B}{x^2+a}+\frac{C x+D}{a x^2+3}$ है,तो $A+B+C-2 D$ का मान ज्ञात कीजिए। ($a$ में)

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