2/\..=0.5???
Ok i htink I have worked it out. Thanks Tetration - I will give you the credit :)
2/\..=0.5
means
2^? = 0.5
$$2^? = \frac{1}{2}$$
and yes the answer is -1
I have no idea what that notation means ??
2-1 = 1/2 = 0,5
Did that help ?