Răspuns:
a/b = 1,6
Explicație pas cu pas:
a/(a-1) = (b+15)/(b+5) a,b∈ℕ
a(b+5) = (a-1)(b+15) <=>
ab+5a = ab+15a-b-15 =>
15a - 5a = b+15 =>
10a = b+15 => a = (b+15)/10
a/b = [(b+15)/10] /b
a/b = (b+15)/10b ; a/b = maxim daca b = minim ; =>
b = 1 => a/b = 16/10 = > a/b = 1,6
#copaceibrainly
