║69/5║+║69/25║=13+2=15
при делении берется только целая часть
1) f(2) = 3
2k = 3
k = 1,5
2) f(3) = 15
3k = 15
k = 5
3) f(-5) = 10
- 5k = 10
k = - 2
...............................................................
9 × а^8 × b^14 / (-3 × a^3 × b^4)^3 =
9 × а^8 × b^14 / -9 × a^9 × b^12 =
-1 × (a^-1 × b^2) =
-1 × (1/a × b^2) =
-1 × (b^2/a) =
-b^2/a