જો ${x^m}{y^n} = {(x + y)^{m + n}}$ હોય,તો ${\left. {\frac{dy}{dx}} \right|_{x = 1, y = 2}}$ ની કિંમત કેટલી થાય?

  • A
    $1/2$
  • B
    $2$
  • C
    $2m/n$
  • D
    $m/2n$

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સમીકરણ $\sin^{2} y + \cos(xy) = \pi$ માટે $\frac{dx}{dy}$ શોધો.

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