State whether each of the following set is finite or infinite :
The set of lines which are parallel to the $x\,-$ axis
State whether each of the following set is finite or infinite :
The set of lines which are parallel to the $x\,-$ axis
The set of lines which are parallel to the $x\,-$ axis is an infinite set because lines parallel to the $x\,-$ axis are infinite in number.
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$\{ a,e\} \subset \{ x:x$ is a vowelin the English alphabet $\} $
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