1 Proof Flashcards
1
Q
What are the steps of doing a proof question?
A
- What type of proof question is it?
- Then do jottings
- Then start proof
- Always end with: Hence the statement is correct.
2
Q
What is the difference between when a question asks about two consecutive numbers and any numbers?
A
- when it is two consecutive numbers use the same letters
- When it is any two numbers use different letters.
3
Q
How do you prove the sum to n of an arithmetic sequence?
A
- Write out the sum normally and then write it out in reverse.
- Then add together and gives you formula.
Forwards
Backwards
Add
Factorise.
4
Q
How do you prove that an equation is positive?
A
Complete the square on it.
5
Q
How do you approach a proof question?
A
- Find what type of proof it is exhaustion, counter example, deduction or contradiction
- Take the steps
- Then write a concluding statement.
6
Q
What is an even number?
A
2n
7
Q
What is an odd number?
A
2n+1, 2n+3 etc
