7) Формула: [tex](\frac{a}{b} )^n=\frac{a^{n} }{b^{n}}[/tex]
[tex](\frac{2}{3})^{3} =\frac{2^{3} }{3^{3}}=\frac{8}{27} .[/tex]
8) [tex](-5)^3+4^3-10^2=-125-100+64=-161.[/tex]
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7) Формула: [tex](\frac{a}{b} )^n=\frac{a^{n} }{b^{n}}[/tex]
[tex](\frac{2}{3})^{3} =\frac{2^{3} }{3^{3}}=\frac{8}{27} .[/tex]
8) [tex](-5)^3+4^3-10^2=-125-100+64=-161.[/tex]