1. \[ a \]
2. \[ \frac{1}{a} \]
3. \[ \frac{1}{e} \]
4. \[ e \]
5. \[ a – b \]
6. \[ 1 \]

Hallar los siguientes límites:

1. \[ \lim_{x\to 0} \frac{\ln(1 + ax)}{x} \]
2. \[ \lim_{x\to 0} \frac{\ln(a + x) – \ln a}{x} \]
3. \[ \lim_{x\to e} \frac{\ln x – 1}{x – e} \]
4. \[ \lim_{x\to 1} \frac{e^x – e}{x – 1} \]
5. \[ \lim_{x\to 0} \frac{e^{ax} – e^{bx}}{x} \]
6. \[ \lim_{x\to +\infty} x \left( e^{\frac{1}{x}} – 1 \right) \]