Data Sufficiency (DS) | What is the value of x? 1) x^-2x=1 2) x^x=1

Hi...

1)\(x^{-2x}=1\)
x can have twovalues..
1.....\(1^{-2*1}=1^{-2}=\frac{1}{1^2}=1\)
-1.....\(-1^{-2*-1}=-1^{2}=1\)
different answers possible
Insuff

2)\(x^x=1\)
Only possibility is x as 1
suff

B
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