Question

Найти производную заданную неявно

Answer 1

Ответ:

$x^2\cdot 3x^2y^4\cdot 8e^{xy}=0\ \ \ \to \ \ \ 24\, x^4\cdot (y^4\cdot e^{xy})=0\\\\24\cdot 4x^3\cdot (y^4\cdot e^{xy})+24x^4\cdot \Big(4y^3\cdot y'\cdot e^{xy}+y^4\cdot e^{xy}\cdot (y+xy')\Big)=0\\\\96x^3\, y^4\, e^{xy}+96x^4y^3\, e^{xy}\cdot y'+24x^4y^4e^{xy}\cdot (y+xy')=0\\\\96x^3\, y^4\, e^{xy}+96x^4y^3\, e^{xy}\cdot y'+24x^4y^5e^{xy}+24x^5y^4e^{xy}\cdot y'=0\\\\y'\cdot (96x^4y^3e^{xy}+24x^5y^4e^{xy})=-96x^3y^4e^{xy}-24x^4y^5e^{xy}$

$y'=\dfrac{-96x^3y^4e^{xy}-24x^4y^5e^{xy}}{96x^4y^3e^{xy}+24x^5y^4e^{xy}}\\\\\\y'=-\dfrac{24x^3y^4e^{xy}\cdot (4+xy)}{24x^4y^3e^{xy}\cdot (4+xy)}\\\\\\y'=-\dfrac{y}{x}$