यदि $\sin \left(\frac{x+y}{x-y}\right)=\tan \frac{\pi}{5}$ है,तो $\frac{d y}{d x}=$

  • A
    $\frac{x}{y}$
  • B
    $\frac{y}{x}$
  • C
    $-\frac{y}{x}$
  • D
    $-\frac{x}{y}$

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यदि ${y^x} + {x^y} = {a^b}$ है,तो $\frac{dy}{dx} = $

यदि ${x^y} = {y^x}$ है,तो $\frac{dy}{dx} = $

यदि $\sin(xy) + \cos(xy) = 0$ है,तो $\frac{dy}{dx} = $

यदि $(x - y)e^{x/(x - y)} = k$ है,तो:

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