Proof by Deduction (AQA A-Level Mathematics): Flashcards

Test whether statements are true or not

Deducing new true statements from statements already known to be true

Implies that; direct consequence

If and only if (iff); double-way implication

$2n$ where $n$ is an integer

$2n+1$ where $n$ is an integer

Show it can be written as $2A$ (multiple of 2)

Show it can be written as $2A+1$

Use same letter (e.g., $n$ and $n+1$)

Use different letters (e.g., $2n$ and $2m$)