Question

Помогите решить 3-4 задания

Answer 1

$6=sqrt{36}\\7=sqrt{49}\\sqrt{36}<sqrt{42}<sqrt{49}\\6<sqrt{42}<7$

$frac{25^{7} }{125^{5}}=frac{(5^{2})^{7}}{(5^{3})^{5}} =frac{5^{14}}{5^{15}}=frac{1}{5}=0,2$