a) ($$\frac{1}{3}$$x⁻¹y²)⁻² = ($$\frac{1}{3}$$)⁻² × (x⁻¹)⁻² × (y²)⁻² = 3² × x² × y⁻⁴ = $$\frac{9x^2}{y^4}$$
б) 1,5a²b⁻³ × 4a⁻³b⁴ = 1,5 × 4 × a² × a⁻³ × b⁻³ × b⁴ = 6 × a²⁻³ × b⁻³⁺⁴ = 6a⁻¹b¹ = $$\frac{6b}{a}$$
Ответ: