• 2022-05-29
    设[tex=3.143x1.214]nCIvBNKHUaI7f4ByoESsvA==[/tex]代表任意集合,试判断下列命题的真假.如果为真,给出证明;如果为假,给出反例.[br][/br][tex=6.786x1.357]Y2ps2vuEBFtBGwptNo7ViaGDmF8fNZYVTn7acovXegw=[/tex]