1. Вычислить:
1) $$log_{\frac{1}{2}} 16$$
$$log_{\frac{1}{2}} 16 = x$$
$$(\frac{1}{2})^x = 16$$
$$2^{-x} = 2^4$$
$$-x = 4$$
$$x = -4$$
Ответ: -4
2) $$5^{1+log_5 3}$$
$$5^{1+log_5 3} = 5^1 \cdot 5^{log_5 3} = 5 \cdot 3 = 15$$
Ответ: 15
3) $$log_3 135 - log_3 20 + 2 log_3 6$$
$$log_3 135 - log_3 20 + log_3 6^2 = log_3 135 - log_3 20 + log_3 36 = log_3 \frac{135 \cdot 36}{20} = log_3 \frac{135 \cdot 9}{5} = log_3 (27 \cdot 9) = log_3 243 = 5$$
Ответ: 5