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properties and sets

quiz on Friday
STUDY
PLAY
commutative property of addition
a+b=b+a
commutative property of multiplication
ab=ba
associative property of addition
a+(b+c)=(a+b)+c
associative property of multiplication
a(bc)=(ab)c
distributive
a(b+c)=ab+ac
multiplicitave inverse
a --> 1/a (reciprocal)
additive inverse
a --> -a
multiplicitive identity
1 ex: 3•1=3
additive identity
0 ex: 3•0=0
universe
all the elements in the given problem
set
a collection of elements from the universe use these { }
intersection
upside down U elements in common
union
U includes all elements from each set NO REPEATS IN # ORDER!
complement
("not") elements from the universe that are not in the set
THE END
ALL DONE!!