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Show that all the rational number less than r is Lower class of r.

Show that all the rational number less than r is Lower class of r. About the video
In this we will see the solved problems on Lower Class.

Lower Class (L) :
(1) L is non-empty proper subset of Q.
(2)If there is a big element in the lower class, then a small element will also come. (3) L has no greatest element.

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