Question

Me ajudem, por favor!

Answer 1

(2/3)^-2 - (1)^-1/2 +《(-1)^-2/4
(3/2)^2 - 1/2 +1/4
9/4 - 1/2 + 1/4
9 - 2/4 + 1/4
7/2 + 1/4
14 - 1/4
13 /4
3,25