Please Help Math

Let U={1, 2, 3, 4, 5, 6, 7, 8, 9} and A={1}. Find the set Ac.

a. {2, 3, 4, 5, 6, 7, 8, 9}
b. {1, 2, 3, 4}
c. {2, 4, 6, 8, 9}
d. {2, 3, 4, 5, 6, 7, 8}

Thank you!

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  1. if you mean the complement of A, it's everything except what is in A.

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