Which of the following are examples of the null set
$\{ y:y$ is a point common to any two parallellines $\} $
Which of the following are examples of the null set
$\{ y:y$ is a point common to any two parallellines $\} $
$\{ y:y$ is a point common to any two parallellines $\} $ is a null set because parallel lines do not intersect. Hence, they have no common point.
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