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OpenStudy (anonymous):
If \[A \subseteq B \] Prove that, \[(A \times C) \subseteq (B \times C )\]
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OpenStudy (anonymous):
I need help :(
OpenStudy (anonymous):
\[A \subseteq B => A \subseteq B \times C\] \[C \subseteq C => C \subseteq B \times C\] thus \[A \times C \subseteq B \times C\]
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