સમીકરણ $x^{3}+x^{2}y+xy^{2}+y^{3}=81$ માટે $\frac{dy}{dx}$ શોધો.

  • A
    $\frac{-(3x^{2}+2xy+y^{2})}{x^{2}+2xy+3y^{2}}$
  • B
    $\frac{-(x^{2}+2xy+3y^{2})}{3x^{2}+2xy+y^{2}}$
  • C
    $\frac{3x^{2}+2xy+y^{2}}{x^{2}+2xy+3y^{2}}$
  • D
    $\frac{x^{2}+2xy+3y^{2}}{3x^{2}+2xy+y^{2}}$

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