Number facts and sequences
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integers
-infinity...0,1,2... infinity
Whole numbers
0,1,2... infinity
Natural numbers
1,2,3....infinity
Compound interest per annum equation
A= P(1+ r/n) to the power of t
Simple interest per annum equation
I= (P*R*T)/ 100
Real numbers
all numbers
expression for the nth term of an arithmetic sequence
an+ b (a= difference between successive terms, b= can be found by looking at the terms, n= position of numbers in sequence)
irrational numbers
cannot be written in the form a/b, square/cube root of x has no perfect square root, or a non terminating and non repetitive decimal
rational numbers
p/q --> p and q are whole numbers, but q cannot= 0
