xokatexo 3 years ago A= {All even integers from 2 to 20, inclusive} B= {10, 12, 14, 16, 18} What is the complement of set B within the universe of set A?

1. jim_thompson5910

Start with set A A= {All even integers from 2 to 20, inclusive} and expand it out to get A = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20} Now erase any number in the set above that you also find in set B.

2. xokatexo

no i get how to get the complement of B i just don't get how to do it within set A the complement of set B is {2, 4, 6, 8, 20}

3. jim_thompson5910

you start with A = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20} then you erase everything the elements in that set above that are also in B. So you erase 10, 12, 14, 16, 18 to get B' = {2, 4, 6, 8, 20}

4. jim_thompson5910

B' means the complement of B

5. xokatexo

I got that one but i dont understand this one: If the universal set is {pennies, nickels, dimes, quarters}, what is the complement of the set nickels?

6. xokatexo

OHHHH IGET ITT

7. jim_thompson5910

set nickels = {collection of all nickels} universal set is {pennies, nickels, dimes, quarters} So start with {pennies, nickels, dimes, quarters} and kick out all the nickels to find the complement of the set of nickels

8. jim_thompson5910

that's great

9. xokatexo

THANKS SO MUCHH!!!

10. jim_thompson5910

you're welcome