a) = 2 * ∛ulamek 27/8 + 1/2 do 1 = 2* ulamek 3/2 + 1/2 = 3,5
b) = 4/3 - ( - 16/9) * 9/10 = 4/3 = 160/81 = 108/81 + 160/81 = 2 i 6/81 taki glupi ulamek
c) nie wiem co tam pisze przy 0,9
zad2
x- 3 < 5/4x - 11/4 (5/4 = 1 i 1/4 11/ 4 = 2 i 3/4)
- 1/4x < - 1/4 ÷(-1/4)
x > 1
:)