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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2 comments:

  1. Maddy19 January 2012 at 08:27

    I always forget the rules, totally gonna save this on my computer so I have it, thanks!

    ReplyDelete
  2. arnold27 January 2012 at 18:29

    Gah! i forgot that when it's negative you treat the two numbers as a fraction. Darn, could have used that on the test.

    ReplyDelete

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