$\frac{1}{x(x+1)(x+2) \ldots(x+n)} = \sum_{r=0}^{n} \frac{A_r}{x+r}$ હોય,તો $A_r$ ની કિંમત શોધો:

  • A
    $(-1)^r \frac{r!}{(n-r)!}$
  • B
    $(-1)^r \frac{1}{r!(n-r)!}$
  • C
    $\frac{1}{r!(n-r)!}$
  • D
    $\frac{r!}{(n-r)!}$

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જો $\frac{1}{(x-1)(x-2)(x-3)}=\frac{A}{x-1}+\frac{B}{x-2}+\frac{C}{x-3}$ અને $\frac{x}{(x-1)(x-2)(x-3)}=\frac{P}{x-1}+\frac{Q}{x-2}+\frac{R}{x-3}$ હોય, તો $A+2B+3C=$

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જો $|x| < 1$ હોય,તો $\frac{3x}{(x-2)(x+1)}$ ના વિસ્તરણમાં $x^5$ નો સહગુણક શું થાય?

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