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Algebra 2 Lesson 1.2 (real numbers)
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Terms in this set (13)
natural number
{1,2,3,...}
whole number
{0,1,2,...}
integers
{...,-1,0,1,...}
real number
a/b
rational numbers
decimal terminates or repeats ex.) 6/7, -3.21, root 23, etc.
irrational numbers
infinite ex.) π, root 23
closure property +/x
a+b is a real number
ab is a real number
commutative property +/x
a+b=b+a
ab=ba
associative property +/x
(a+b)+c=(a+c)+b
(ab)c=a(bc)
distributive property
a(b+c)= ab+ac
identity property +/x
a+0=a
a•1=a
inverse property +/x
a+(-a)=0
a•1/a=1
trichotomy
a>b, a<b, a=b
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