| f(a+h)−f(a) | ||
wg wzoru standardowego f'(a)= lim | gdzie h dazy do 0 | |
| h |
| 3√x2−4 | t2−4 | |||
f'(8)=limx→8 | =limt→2 | = | ||
| x−8 | t3−8 |
| t+2 | 1 | |||
=limt→2 | = | |||
| t2+2t+4 | 3 |
| 3√(8+h)2 − 3√82 | ||
f'(8) = limh−>0 | = | |
| h |
| (8+h)2 − 82 | ||
= lim | = | |
| h( 3√(8+h)4 + 3√(8*(8+h))2 + 16) |
| 16h + h2 | ||
= lim | = | |
| h( 3√(8+h)4 + 3√(8*(8+h))2 + 16) |
| 16 + h | ||
= lim | = | |
| 3√(8+h)4 + 3√(8*(8+h))2 + 16) |
| 16 | 16 | 1 | ||||
= | = | = | ||||
| 3√84 + 3√82*82 + 16 | 3*16 | 3 |