Răspuns:
0
Explicație pas cu pas:
[tex]a = \Big( - \frac{^{3)} 5}{24} + \frac{^{9)}9}{8} - \frac{^{2)}3}{36} \Big) \cdot 1 \frac{3}{15} = \\ = \frac{ - 15 + 81 - 6}{72} \cdot \frac{18}{15} = \frac{60}{4} \cdot \frac{1}{15} = \frac{60}{60} = \bf 1[/tex]
[tex]a - \frac{1}{a} = 1 - \frac{1}{1} = 1 - 1 = \bf 0 \\ [/tex]
