Edexcel A Level Maths: Pure:复习笔记1.1.2 Proof by Deduction

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

• ℕ - the set of natural numbers
• ℤ - the set of integers
• ℚ - the set of quotients/rational numbers
• ℝ - the set of real numbers