Friday 20 January 2012

remeber the basics

-x-=+
-x+=-
+x+=+
same for division
addition and subtraction 
depends on numbers




Quadradic function

Ax^2+bx+c General

A(x-h)^2+k Standard

A(x-x1)(x-x2) Factored









number word conversion for exponential function

 triple=3 base
double=2 base
half=1/2 or .5 base
increase interest 1+% base
decrease interest 1-% base




Wednesday 18 January 2012

Three things you need to now about log's

The three rules of log's if the base is the same

smooshing
log(2)+log(7)=log(2x7)
         ^---if negative then its log(2/7)
reverse

expanding
log(2x7)=log(2)+log(7)

third rule 
2xlog (5)=log(5)^2