а) $$\frac{8^{16}}{16^{12}}$$
$$8 = 2^3$$
$$16 = 2^4$$
$$\frac{(2^3)^{16}}{(2^4)^{12}}$$
$$\frac{2^{3 \cdot 16}}{2^{4 \cdot 12}} = \frac{2^{48}}{2^{48}}$$
$$\frac{2^{48}}{2^{48}} = 1$$
Ответ: 1
б) $$\frac{81^{25}}{27^{33}}$$
$$81 = 3^4$$
$$27 = 3^3$$
$$\frac{(3^4)^{25}}{(3^3)^{33}}$$
$$\frac{3^{4 \cdot 25}}{3^{3 \cdot 33}} = \frac{3^{100}}{3^{99}}$$
$$\frac{3^{100}}{3^{99}} = 3^{100-99} = 3^1 = 3$$
Ответ: 3