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Math Help - General and subsets

  1. #16
    MHF Contributor Drexel28's Avatar
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    Quote Originally Posted by hellfire127 View Post
    ok so 6 is true by what i did on first post? then what did you mean by the reverse inclusion? that F(A)⋂(FB)=F(A⋂B) is false right?
    The reverse inclusion F(A)\cap F(B)\supseteq F(A\cap B) is not true.
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  2. #17
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    Quote Originally Posted by Drexel28 View Post
    The reverse inclusion F(A)\cap F(B)\supseteq F(A\cap B) is not true.
    ok i think i see what you mean now. the = in the problem means it's both ways. so i have proven one way which is true but the reverse inclusion is not true. so the answer for number 6 is NO.

    now do i have to do the reverse inclusion for number 7 as well?
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