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Mathematics, 20.09.2019 17:30 MakenaFink

Show that if a cb, then a = b ( b a ). show that if a c b, then a u (b \ a) = b. show, by example, that for sets a, b, and c, an b = an c does not imply b = c.

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Show that if a cb, then a = b ( b a ). show that if a c b, then a u (b \ a) = b. show, by example, t...
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