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If A={-1,1}, find A xx A xx A...

If `A={-1,1}`, find `A xx A xx A`

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The correct Answer is:
`A xx A={(-1,-1),(,-1,1),(1,-1,),(1,1)}`
`A xx A xx A={(-1,-1,-1),(,-1,-1,1),(,-1,1,-1),(,-1,1,1),(,1,-1,-1),(1,-1,1),(1,1,-1),(1,1,1)}`
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