Describe the set in set-builder form : D = 21,23,25,27,29,31,33,3… - Vidyadip

Question

Describe the set in set-builder form :
$D =\{21,23,25,27,29,31,33,35,37\}$.

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Answer

$D =\{x \mid x=2 n+19 n \in N, 1 \leq n \leq 9\}$

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