3 do potęgi -1 : 9 do potęgi 2 - ( 3 do potęgi - 2 ) do potęgi 3
_______________________________________________ kreska ułamkowa
( - 27 ) do potęgi - 2
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1/3 : 81 - 1/729
-------------------- = 1/3 : 1/81 - 1/729 x 729 = 1/243 - 1/729 x 3=729/729 - 1/729 x 3 =729/729-
1/729
- 3/729 = 726/729
x--> razy