osamamansoor2016
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- Sep 25, 2016
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Can some one please help me to solve these question using SETS (de Morgan's law)
\(\displaystyle \mbox{Show that, if }\, A,\, B,\, C,\, \mbox{ and }\, D\, \mbox{ are sets such that}\)
. . .\(\displaystyle A\, \subseteq\, C\, \mbox{ and }\, B\, \subseteq\, D\)
\(\displaystyle \mbox{then}\)
. . .\(\displaystyle A\, \times\, B\, \subseteq\, C\, \times\, D\)
\(\displaystyle \mbox{Show that, if }\, A,\, B,\, C,\, \mbox{ and }\, D\, \mbox{ are sets such that}\)
. . .\(\displaystyle A\, \subseteq\, C\, \mbox{ and }\, B\, \subseteq\, D\)
\(\displaystyle \mbox{then}\)
. . .\(\displaystyle A\, \times\, B\, \subseteq\, C\, \times\, D\)
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