यदि $\frac{3x^2+x+1}{(x-1)^4} = \frac{a}{(x-1)} + \frac{b}{(x-1)^2} + \frac{c}{(x-1)^3} + \frac{d}{(x-1)^4}$ है,तो $\left[\begin{array}{ll}a & b \\ c & d\end{array}\right]$ का मान ज्ञात कीजिए।

  • A
    $\left[\begin{array}{ll}3 & 7 \\ 5 & 0\end{array}\right]$
  • B
    $\left[\begin{array}{ll}0 & 3 \\ 7 & 5\end{array}\right]$
  • C
    $\left[\begin{array}{ll}0 & 7 \\ 3 & 5\end{array}\right]$
  • D
    $\left[\begin{array}{ll}3 & 5 \\ 7 & 0\end{array}\right]$

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यदि $\frac{d}{d x}\left(\frac{2 x+1}{(x+1)^2(x-2)}\right)=\frac{A}{(x-2)^2}+\frac{B}{(x+1)^3}+\frac{C}{(x+1)^2}$ है, तो $A+B+C=$

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