dontron's blog
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-x
1
)(x-x
2
) 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
Thursday, 19 January 2012
conversion of log's to exponential
a(b)^x=y = logb(y/a)=x
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
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