| 1 | 8 | |||
1. lim | − | |||
| x−7 | x2 −6x −7 |
| x − √x | ||
2. lim | ||
| x+√x |
| 21/x +1 | ||
3. lim | ||
| 21/x −1 |
| x − √x |
| ||||||||||||
2) f(x) = | = | ||||||||||||
| x +√x |
|
| 1 − 0 | ||
lim f(x) = | = 1 | |
| 1 + 0 |
| x +1 | 8 | x − 7 | 1 | |||||
f(x) = | − | = | = | |||||
| ( x −7)*(x +1) | (x +1)*(x −7) | (x +1)*(x − 7) | x +1 |
| 1 | 1 | |||
lim f(x) = | = | |||
| 7 + 1 | 8 |