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Ch $02$ Sec $1$ Ex $26$ MAIN $-$ Identifying Power Sets

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NOTE: This is a multi$-$part question. Once an answer is submitted, you will be unable to return to this part.

Determine whether each of these sets is the power set of a set, where a and b are distinct elements.

Ch $02$ Sec $1$ Ex $26($a$)-$ Identifying Power Sets

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Multiple Choice

This is the power set of $.$

This cannot be the power set of any set.

This is the power set of $\{\}$

This is the power set of $\{\{\}\}.$