Question

1) (5³.5²): 5¹⁵; дам 40балов​

Answer 1

$(5^3\cdot 5^2):5^{15} = 5^{3+2}:5^{15} = 5^5:5^{15} = 5^{5-15} = 5^{-10} = \frac{1}{5^{10}}.$