1680 2
--------- = ---- сокращаем на 840
12600 15
-----------------------------------------------------------------------------------------------
75*12+75*4 75*(12+4)
= ---------------- = --------------- = 16 сокращаем на 75
75 75
--------------------------------------------------------------------------------------------------
17*(30-15) 17*15 1
= --------------- = ---------- = ---- сокращаем на 17 и 15
34* 15 34*15 2
--------------------------------------------------------------------------------------------
1
= --- сокращаем на k⁶
k
---------------------------------------------------------------------------------------------
9n
= ---- сокращаем на 4an
b
---------------------------------------------------------------------------------------------------
не видно