| 1 | ||
ile jest równa pochodna z | po x | |
| 2+x2 |
| −2x | |
| (2+x2)2 |
| 1 | 1 | 2x | ||||
( | )' = − | *2x = − | ||||
| 2+x2 | (2+x2)2 | (2+x2)2 |
| 1 | ||
a czemu nie u=2+x2; ( | )' *u' = ... | |
| u |
| 0*(2+x2)−1*(2+x2)' | −1*2x | −2x | |||
= | = | ||||
| (2+x2)2 | (2+x2)2 | (2+x2)2 |
| −1 | −1 | −1 | ||||
i wynik | * u' = | * (2+x2)' = | * 2x masz to samo  | |||
| u2 | (2+x2)2 | (2+x2)2 |