it is a domain error when trying to take 0 to the -1 power, but other negative powers are still just 0 (the same as positive) I'm not sure why -1 isn't though.
I guess that's what the calculator said. Taking zero to a negative one power (or any negative power) is the same as 1 divided by 0, which is undefined. You could say it's infinity, but the limit does not exist.
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2^-1 is the same as 1/2^1 which is 1/2 or 0.5
1.
Every number to the power of 0 equals 1.because the the power of x is 1 because 1 have no value
1 to the power of anything is always 1.
0-(-1) is the same as 0+1, so 0-(-1)=1