1) НОЗ: 6(n-5)(n+5)
2 / 3(n-5) = 2*2(n+5) / 6(n-5)(n+5) = 4n+20 / 6(n-5)(n+5)
1 / 2(n+5) = 3(n-5) / 6(n-5)(n+5) = 3n-15 / 6(n-5)(n+5)
2) НОЗ: 6(b+1)
a / 2(b+1) = 3a / 6(b+1)
x / 3(1+b) = 2x / 6(b+1)
2 < а < 5
8 < b < 10
2/8 < a/b < 5/10
1/4 < a/b < 1/2
1/4 < a/b < 2/4
1 < a/b < 2
Ответ а/b больше 1, но меньше 2