120° Вправа 120Алгебра 8 клас Тарасенкова 2025 · § 3 · стор. 38

120. Зведіть дріб 1/(xy) до знаменника:

1) ${\displaystyle \frac{1^{\mathrm{\setminus }4}}{xy}=}$${\displaystyle \frac{1\cdot 4}{xy\cdot 4}=}$${\displaystyle \frac{4}{4xy}}$;

2) ${\displaystyle \frac{1^{\mathrm{\setminus }x}}{xy}=}$${\displaystyle \frac{1\cdot x}{xy\cdot x}=}$${\displaystyle \frac{x}{x^{2}y}}$;

3) ${\displaystyle \frac{1^{\mathrm{\setminus }y}}{xy}=}$${\displaystyle \frac{1\cdot y}{xy\cdot y}=}$${\displaystyle \frac{y}{x{y}^2}}$;

4) ${\displaystyle \frac{1^{\mathrm{\setminus }5x}}{xy}=}$${\displaystyle \frac{1\cdot 5x}{xy\cdot 5x}=}$${\displaystyle \frac{5x}{5x^{2}y}}$;

5) ${\displaystyle \frac{1^{\mathrm{\setminus }6z}}{xy}=}$${\displaystyle \frac{1\cdot 6z}{xy\cdot 6z}=}$${\displaystyle \frac{6z}{6xyz}}$;

6) ${\displaystyle \frac{1^{\mathrm{\setminus }7xy}}{xy}=}$${\displaystyle \frac{1\cdot 7xy}{xy\cdot 7xy}=}$${\displaystyle \frac{7xy}{7x^2{y}^2}}$.