यदि $y = \frac{3}{4} + \frac{3 \times 5}{4 \times 8} + \frac{3 \times 5 \times 7}{4 \times 8 \times 12} + \ldots$ अनंत तक है,तो

  • A
    $y^2 - 2y + 5 = 0$
  • B
    $y^2 + 2y - 7 = 0$
  • C
    $y^2 - 3y + 4 = 0$
  • D
    $y^2 + 4y - 6 = 0$

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$(1 - 9x + 20{x^2})^{-1}$ के विस्तार में ${x^n}$ का गुणांक क्या है?

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यदि $y = \frac{3}{4} + \frac{3 \cdot 5}{4 \cdot 8} + \frac{3 \cdot 5 \cdot 7}{4 \cdot 8 \cdot 12} + \dots \infty$ है,तो

यदि $(2-5x)^{-1/5} = a_0 + a_1x + a_2x^2 + \ldots$ है,तो $\frac{a_1}{a_2} = $

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