Funktionen
Logarithmus
$$\log_b(x) = y \iff b^y = x$$
$$\ln(x) = \log_e(x)$$
Regeln:
$$\log(a \cdot b) = \log a + \log b$$
$$\log\frac{a}{b} = \log a - \log b$$
$$\log(a^n) = n \cdot \log a$$
Beispiel:
$$\log_2(8) = 3 \quad\text{weil}\quad 2^3 = 8$$