यदि $z = y + f(v)$,जहाँ $v = \frac{x}{y}$ है,तो $v \frac{\partial z}{\partial x} + \frac{\partial z}{\partial y}$ का मान क्या है?

  • A
    $-1$
  • B
    $1$
  • C
    $0$
  • D
    $2$

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यदि $u = u(x, y) = \sin(y + ax) - (y + ax)^2$ है,तो निम्नलिखित में से कौन सा सत्य है?

यदि $u = x y^2 \tan^{-1}\left(\frac{y}{x}\right)$ है,तो $x \frac{\partial u}{\partial x} + y \frac{\partial u}{\partial y}$ का मान ज्ञात कीजिए।

यदि $z=\sec (y-ax)+\tan (y+ax)$ है,तो $\frac{\partial^2 z}{\partial x^2}-a^2 \frac{\partial^2 z}{\partial y^2}$ का मान ज्ञात कीजिए।

यदि $z = \frac{y}{x} \left[ \sin \left( \frac{x}{y} \right) + \cos \left( 1 + \frac{y}{x} \right) \right]$ है,तो $x \frac{\partial z}{\partial x} = $

यदि $u = \sin^{-1}\left(\frac{y}{x}\right)$ है,तो $\frac{\partial u}{\partial x}$ का मान क्या होगा?

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