433 Вправа 433Алгебра 8 клас Бевз 2025 · § 9 · стор. 89

433. Rewrite the fraction as a power with a negative integer exponent.

a) ${\displaystyle \frac{1}{3}=}$${\displaystyle 3^{-1}}$;

b) ${\displaystyle \frac{1}{7^3}=}$${\displaystyle 7^{-3}}$;

c) ${\displaystyle \frac{1}{z^5}=}$${\displaystyle z^{-5}}$;

d) ${\displaystyle \frac{1}{x^2{y}^2}=}$${\displaystyle x^{-2}{y}^{-2}}$;

e) ${\displaystyle \frac{1}{a^3-c^3}=}$${\displaystyle {\left(a^3-c^3\right)}^{-1}}$.