proof

Question 1

counterexample

Answer 1

used to prove if something is false
you substitute a value and show its false

Question 2

direct proof

Answer 2

you prove h implies c

Question 3

Contrapositive

Answer 3

you prove not c implies not h
if this is proved the original is true

Question 4

Contradiction

Answer 4

assume either h or c is false, if the false is proved then the original is true

Question 5

d(k+1)/dx(k+1)

Answer 5

this is teh same as
d/dx (d(k)/dx(k))

Question 6

what is the converse of a statement

Answer 6

c implies h