a) (³3/4+²5/6):2 1/9-(1/2)²=(19/12):(19/9)-1/4=
(19/12)×(9/19)=9/12=3/4
b) [(1/2)⁰+1/2+(1/2)²+(1/2)³]:(2⁰+2+2²+2³)=
(⁸1+⁴1/2+²1/4+1/8):(1+2+4+8)=
(8+4+2+1)×1/(1+2+4+8)=1
c) (6/4)¹³×(3/2)⁸:(1 1/2)¹⁹-2=
(3/2)¹³×(3/2)⁸:(3/2)¹⁹-2=(3/2)²¹×(2/3)¹⁹-2=
(3/2)²-2=9/4-⁴2=(9-8)/4=1/4
[tex].[/tex]
