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  2. Set Theory: Sideways U with a line under it

I know the sideways U means "is a subset of" and if there is a line under it, it means "is equal to"

I have two sets:

{-3,0,3} _____ {-3,-1,1,3}

choose the correct symbol
a. sideways U with line under it and slash through it
b. sideways U with line under it but no slash at all

-3, and 3 are subsets, but 0 is not in the other set... would that make the answer b?

please, help?

thank you!

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Ashley
1 answer

  1. As you said, 0 is not in the second set,
    So, the answer is (a): NOT a subset

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    Steve

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