Raíces cúbicas de expresiones compuestas.

7. ${\displaystyle \frac{22x-97}{30}}$.

8. ${\displaystyle \frac{3x-4}{15x}}$.

9. ${\displaystyle \frac{a^3-b^3+c^3-abc}{abc}}$.

Ejercicio47.

1. ${\displaystyle \frac{2x+1}{(x+3)(x-2)}}$.

2. ${\displaystyle \frac{2x}{x^2-1}}$.

3. ${\displaystyle \frac{3x+16}{(x-8)(x+2)}}$.

4. ${\displaystyle \frac{4ax}{a^3-x^2}}$.

5. ${\displaystyle \frac{ax}{x^2-a^2}}$.

6. $-{\displaystyle \frac{4ab}{4a^2-b^2}}$.

7. ${\displaystyle \frac{1}{9-a^2}}$.

8. ${\displaystyle \frac{b}{a^2-b^2}}$.

9. ${\displaystyle \frac{5x+8}{x^2-4}}$.

10. ${\displaystyle \frac{1+x}{1-9x^2}}$.

11. ${\displaystyle \frac{3(a^2+4a+1)}{a(a+1)(a+3)}}$.

12. ${\displaystyle \frac{2}{x^2-1}}$.

13. ${\displaystyle \frac{2x^2}{(x+2)(x-3)}}$.

14. $0$.

Ejercicio48.

1. $0$.

2. ${\displaystyle \frac{2a}{a+b}}$.

3. ${\displaystyle \frac{7a}{1-a^2}}$.