va rog frumos si punctele a si b dau coroana

Răspuns:
a) [(1/3-1/9)^2+(1/3)^3]÷(1/3)^4
[(2/9)^2+(1/3)^3]÷(1/3)^4
[4/81+1/27]÷(1/3)^4
7/81÷1/81
7/81×81
7
b)[(5/2+5/4-3/4)÷5+2/5]^5
[(10/4+5/4-3/4)÷5+2/5)]^5
[(15/4-3/4)÷5+2/5)^5
(12/4÷5+2/5)^5
(3/5+2/5)^5
(5/5)^5
1^5
1
^ = putere
/ = supra