# Lecture 1 part 1

- StudyBlue
- Wisconsin
- University of Wisconsin - Madison
- Mathematics
- Mathematics 114
- Lino Amorim/nenciu
- Lecture 1 part 1

**Created:**2009-01-27

**Last Modified:**2011-07-02

#### Related Textbooks:

Precalculus#### Related Textbooks:

Student Solutions Manual to Accompany Precalculus: Functions And Graphspi = 3.14159265

Square root of 2 = 1.41...

0.9 = 1.0 = 1

Addition...

Multiplication...

Multiplication: a x b

a x b = b x a

(a x b)c = a(b x c)

Additive identity

Multiplicative identity

multiplicative identity: a x 1 = 1 x a = a

additive inverse

multiplicative inverse

if b does not equal 0 then the multiplicative inverse of b is 1/b: b x 1/b = 1

If a/b = 0 and b does not equal 0 then...

a = 0

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