can someone please explain to me how it goes from the first line to the second? (from a normal equation to an infinite series)??

 

Thanks

 

Sarah

It's a binomial expansion of [math]\frac{1}{1+\frac{t}{3}}[/math].

can you do the same thing with taylor series thingos?

The binomial expansion is the Taylor expansion about x=0

oh ok, lol, i havent yet done the binomial expansion, so yeah didnt know that! thanks DQW!