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In a group (G,**) for some element a of ...

In a group `(G,**)` for some element a of G `, a^(2) = e,` where e is the indentity element . Then

A

`a= a^(-1)`

B

`a = sqrte`

C

`a= (1)/(a^(2))`

D

`a=e`

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