431. Найдите значение выражения: a) 5⁶:5⁴; б) 10¹⁵: 10¹²; в) 0,5¹⁰: 0,5⁷; г) (1 1/3)⁸ : (1 1/3)⁶; д) 2,73¹³: 2,73¹²; e) (-2/3)⁷ : (-2/3)⁴

a) $$5^6 : 5^4 = 5^{6-4} = 5^2 = 25$$ б) $$10^{15} : 10^{12} = 10^{15-12} = 10^3 = 1000$$ в) $$0.5^{10} : 0.5^7 = 0.5^{10-7} = 0.5^3 = 0.125$$ г) $$(1 \frac{1}{3})^8 : (1 \frac{1}{3})^6 = (\frac{4}{3})^8 : (\frac{4}{3})^6 = (\frac{4}{3})^{8-6} = (\frac{4}{3})^2 = \frac{16}{9} = 1 \frac{7}{9}$$ д) $$2.73^{13} : 2.73^{12} = 2.73^{13-12} = 2.73^1 = 2.73$$ е) $$(-\frac{2}{3})^7 : (-\frac{2}{3})^4 = (-\frac{2}{3})^{7-4} = (-\frac{2}{3})^3 = -\frac{8}{27}$$