Răspuns:
- 5
Explicație pas cu pas:
[tex]( {(- 8)}^{13}\div{(- 4)}^{17}-{(-3)}^{21}\div {( - 9)}^{10}) \div ( - 7) = \frac{{(-{2}^{3})}^{13}\div{(-{2}^{2})}^{17}-{(-3)}^{21}\div{(-{3}^{2} )}^{10}}{ - 7} = \frac{{(-{2}}^{39})\div{ (- {2}}^{34})-{(-3}^{21})\div{{3}}^{20}}{-7} = \frac{{{2}}^{39 - 34} + {3}^{21 - 20}}{-7} = - \frac{ {2}^{5} +3}{7} = - \frac{32 + 3}{7} = - \frac{35}{7} = - 5[/tex]
