Asked by School Rocks

Suppose R = {1, 3, 5, 7, 9, 11, 13, 15, 17} and D = {3, 6, 9, 12, 15, 18, 21, 24, 27}. What is the R $ D? A. {3, 9, 15} B. {1, 5, 7, 11, 13, 17} **C. {1, 3, 5, 6, 7, 9, 11, 12, 13, 15, 17, 18, 21, 24, 27} D. {6, 12, 18, 21, 24, 27}

Please help
Answered by bobpursley
what does the $ mean? Joint SET (Union)? or OR? or Either OR?
Answered by School Rocks
Its a n but it looks weird
Answered by bobpursley
A∩B....intersection....objects that belong to set A and set B
You need to memorize those symbols.

R intersection B means 3,9,15 as those are in both sets.
Answered by bobpursley
https://www.rapidtables.com/math/symbols/Set_Symbols.html
Answered by Damon
Also Google Venn diagram.
Answered by little pp Dave
{3,9,15}
Answered by McDonald's play house
(little pp Dave) you are correct! thank you for your help.
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