यदि $ax^2+2hxy+by^2=3$ है, तो $\frac{d^2y}{dx^2}=$

  • A
    $\frac{(hx^2+by+ax)}{(ax+hy)^2}$
  • B
    $\frac{(axy+hx^2+byx)}{(ax+by)^2}$
  • C
    $\frac{3(h^2-ab)}{(hx+by)^3}$
  • D
    $\frac{(ab+h)^2}{(ax+hy)^2}[h(x^2+y^2)+xy(a+b)]$

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