Autorzy:Praca zbiorowa
Wydawnictwo:WSiP
Rok wydania:2015
Oblicz. a) (1/5+2/3+4/5+1/3-2) 5.0 gwiazdek na podstawie 6 opinii

a)

 `0,75^2 -5/6-1/2 = (3/4)^2 -5/6-3/6=9/16-8/6=9/16-4/3` `=27/48 -64/48 = -37/48`

b)

 `2/3-5/7 -(1 1/3)^2 =14/21-15/21 - (4/3)^2 = -1/21 - 16/9 = ` `-3/63 - 112/63=-115/63 = -1 52/63`

c) 

`(0,6-1/3+0,25)^2 = (3/5-1/3+1/4)^2 = (36/60 -20/60+15/60)^2` ` =(31/60)^2 = 961/3600` 

d)

 `4/5 - (0,75+1,2)^2 =4/5-1,95^2 =4/5- (1 95/100)^2=4/5-(1 19/20)^2=4/5-(39/20)^2=`

` ` `=4/5- 1521/400 = 320/400 - 1521/400 = -1201/400 = -3 1/400`