Question

Пожалуйста помогите!

Answer 1

lgz = lg(n^2-s^2) - 2lg(n+s) = lg(n^2-s^2) - lg(n+s)^2 = lg (n^2 - s^2) / (n+s)^2 = lg(n-s)/(n+s)

lgz = lg (n-s)/(n+s)

z = n-s/n+s

Answer 2

lg z = lg((n-s)(n+s))-lg(n+s)^2;

lg z = lg((n-s)(n+s)/(n+s)^2;

z = (n-z)/(n+s)