Question

252.55
5?
7. Вычислите:

Answer 1

$\displaystyle\bf\\\frac{25^{2}\cdot5^{5} }{5^{7} } =\frac{(5^{2})^{2} \cdot5^{5} }{5^{7} } =\frac{5^{4}\cdot5^{5} }{5^{7} } =\frac{5^{4+5} }{5^{7} } =\frac{5^{9} }{5^{7} }=5^{9-7} =5^{2} =25$