Question

me ajudem... potências

Answer 1

x = (2^-2 + 2^2 - 2^-1) / (2^-2 - 2^-1)
x = (1/2^2 + 4 - 1/2) / (1/2^2 - 1/2)
x = (1/4 + 4 - 1/2) / (1/4 - 1/2)
x = (1 + 16 - 2)/4 / (1 - 2)/4
x = 15/4 / -1/4
x = 15/-1
x = -15