Ответ:
Вычислить значения выражений . Применяем свойства степеней .
[tex]\displaystyle \bf 1)\ \ 9^{10}:9^8=9^{10-8}=9^2=81\\\\\\\frac{0,4^{17}}{0,4^{14}}=0,4^{17-14}=0,4^{3}=0,064\\\\\\\Big(-1\frac{1}{9}\Big)^{15}:\Big(-1\frac{1}{9}\Big)^{13}=\Big(-1\frac{1}{9}\Big)^{15-13}=\Big(-1\frac{1}{9}\Big)^{2}=\Big(-\frac{10}{9}\Big)^{2}=\frac{100}{81}=1\frac{19}{81}\\\\\\\frac{\Big(1\dfrac{1}{3}\Big)^{12}}{\Big(1\dfrac{1}{3}\Big)^{8}}=\Big(1\frac{1}{3}\Big)^{4}=\Big(\dfrac{4}{3}\Big)^{4}=\dfrac{256}{81}=3\dfrac{13}{81}[/tex]
[tex]\bf \displaystyle 2)\ \ \frac{8^{12}\cdot 8^3}{8^{13}}=\frac{8^{15}}{8^{13}}=8^2=64\\\\\\\frac{4^8}{4\cdot 4^6}=\frac{4^8}{4^7}=4\\\\\\\frac{(-3)^5\cdot (-3)^7}{(-3)^{10}}=\frac{(-3)^{12}}{(-3)^{10}}=(-3)^2=9\\\\\\\frac{(0,2)^7\cdot (0,2)^5}{(0,2)^3\cdot (0,2)^6}=\frac{(0,2)^{12}}{(0,2)^9}=(0,2)^3=0,008[/tex]
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Answers & Comments
Ответ:
Вычислить значения выражений . Применяем свойства степеней .
[tex]\displaystyle \bf 1)\ \ 9^{10}:9^8=9^{10-8}=9^2=81\\\\\\\frac{0,4^{17}}{0,4^{14}}=0,4^{17-14}=0,4^{3}=0,064\\\\\\\Big(-1\frac{1}{9}\Big)^{15}:\Big(-1\frac{1}{9}\Big)^{13}=\Big(-1\frac{1}{9}\Big)^{15-13}=\Big(-1\frac{1}{9}\Big)^{2}=\Big(-\frac{10}{9}\Big)^{2}=\frac{100}{81}=1\frac{19}{81}\\\\\\\frac{\Big(1\dfrac{1}{3}\Big)^{12}}{\Big(1\dfrac{1}{3}\Big)^{8}}=\Big(1\frac{1}{3}\Big)^{4}=\Big(\dfrac{4}{3}\Big)^{4}=\dfrac{256}{81}=3\dfrac{13}{81}[/tex]
[tex]\bf \displaystyle 2)\ \ \frac{8^{12}\cdot 8^3}{8^{13}}=\frac{8^{15}}{8^{13}}=8^2=64\\\\\\\frac{4^8}{4\cdot 4^6}=\frac{4^8}{4^7}=4\\\\\\\frac{(-3)^5\cdot (-3)^7}{(-3)^{10}}=\frac{(-3)^{12}}{(-3)^{10}}=(-3)^2=9\\\\\\\frac{(0,2)^7\cdot (0,2)^5}{(0,2)^3\cdot (0,2)^6}=\frac{(0,2)^{12}}{(0,2)^9}=(0,2)^3=0,008[/tex]