![F = [f(x^2-4y)]^{g(x^3-y)}](/tpl/images/3777/6282/68b2e.png)
найти все частные производные 
![F'_x =[f(x^2-4y)]^{g(x^3-y)}\left[3x^2g'_x(x^3-y) \ln [f(x^2-4y)] + \frac{2x *g(x^3-y)f'_x(x^2-4y)}{f(x^2-4y)}\right]\\ \\F'_y =[f(x^2-4y)]^{g(x^3-y)}\left[-g'_y(x^3-y) \ln [f(x^2-4y)]-\frac{4*g(x^3-y)f'_y(x^2-4y)}{f(x^2-4y)}\right]](/tpl/images/1356/0950/89094.png)
Пошаговое объяснение:
прологарифмируем обе части
![\ln F=\ln [f(x^2-4y)]^{g(x^3-y}) \\ \\ \ln F=g(x^3-y) \ln [f(x^2-4y)] \\ \\ 1) \ \frac{F'_x}{F} =[g'_x(x^3-y)*(x^3-y)'_x* \ln [f(x^2-4y)]+ \\ \\ +g(x^3-y)*(\ln [f(x^2-4y)])'_x*f'_x(x^2-4y)*(x^2-4y)'_x] \\ \\ \frac{F'_x}{F} =[g'_x(x^3-y) *3x^2*\ln [f(x^2-4y)]+ \\ \\ +g(x^3-y)* \frac{1}{f(x^2-4y)}*f'_x(x^2-4y)*2x] \\ \\](/tpl/images/1356/0950/05bbe.png)
![F'_x =F*\left[3x^2g'_x(x^3-y) \ln [f(x^2-4y)] + \frac{2x *g(x^3-y)f'_x(x^2-4y)}{f(x^2-4y)}\right] \\ \\ F'_x =[f(x^2-4y)]^{g(x^3-y)}\left[3x^2g'_x(x^3-y) \ln [f(x^2-4y)] + \frac{2x *g(x^3-y)f'_x(x^2-4y)}{f(x^2-4y)}\right]](/tpl/images/1356/0950/adbf8.png)
![2) \ \frac{F'_y}{F} =[g'_y(x^3-y)*(x^3-y)'_y* \ln [f(x^2-4y)]+ \\ \\ +g(x^3-y)*(\ln [f(x^2-4y)])'_y*f'_y(x^2-4y)*(x^2-4y)'_y] \\ \\ \frac{F'_y}{F} =[g'_y(x^3-y)*(-1)* \ln [f(x^2-4y)]+ \\ \\ +g(x^3-y)*\frac{1}{f(x^2-4y)}*f'_y(x^2-4y)*(-4)] \\ \\ F'_y =F*\left[-g'_y(x^3-y) \ln [f(x^2-4y)]-\frac{4*g(x^3-y)f'_y(x^2-4y)}{f(x^2-4y)}\right] \\ \\ F'_y =[f(x^2-4y)]^{g(x^3-y)}\left[-g'_y(x^3-y) \ln [f(x^2-4y)]-\frac{4*g(x^3-y)f'_y(x^2-4y)}{f(x^2-4y)}\right]](/tpl/images/1356/0950/ee231.png)
