| d2z | 2xy3 | |||
podany to: | =− | . A mi wychodzi: | ||
| dxdx | (xy)2+1)2 |
| d2z | 2xy2 | |||
=− | Gdzie jest błąd? | |||
| dxdx | (xy)2+1)2 |
| dz | y | |||
a i dodatkowo pochodne cząstkowe I rzędu wyszły: | = | natomiast | ||
| dx | (xy)2+1 |
| dz | x | |||
= | ||||
| dy | (xy)2+1 |
| 1 | y | |||
f'x = | *(y) = | |||
| 1+(xy)2 | 1+(xy)2 |
| 2xy3 | ||
f'xx = y*[ [1+(xy)2]−1 ]' = y[−(1 + x2y2)−2*2xy2] = − | ||
| [(1+(xy)2]2 |