What is proof by deduction?

• Proof by deduction is when a mathematical and logical argument is used to shows whether or not a result is true

How to do proof by deduction

?You may also need to:

• Write multiples of?n?in the form?kn?for some integer?k
• Use algebraic techniques, showing logical steps of simplifying
• Use correct mathematical notation

Sets of numbers

• ? - the set of?natural numbers
• ? - the set of?integers
• ? - the set of?quotients/rational numbers
• ? - the set of?real numbers