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Need help on this one as well; Find the first three terms of a geometric sequence given that the sum of the first four terms is 65/3 and the sum to infinity is 27

I've seen this question posted on the net twice, but I couldn't understand how it was done until you posted your working, Thanks a lot.

Hello guys, I need help with these questions; 1. For the series function defined by Sn = 3n^2 -11n, find tn and hence show that the sequence is arithmetic 2. The first and second terms of an arithmetic sequence are a and b respectively. If the nth term is c, express i terms of a b and c and...

Hmm true... All the other questions I've done so far from this book are rather easy, I'll look into success one, thanks for the advice.

Oh wow so simple, thanks a lot. Wonder why they over-complicated it in the example...

Recently I discovered that Maths in Focus isn't good for HSC so I upgraded to Fitzpatrick, and I can see why Maths in Focus ain't good. I am trying to do question 11 from exercise 11 b and can't seem to get anywhere near the answer, can anyone help me? The question is; Insert 5 terms in...

Sorry never realized it was a taboo to reply to a 5 year old thread, I did it just in case someone else like me was searching for an answer, although that wasn't my question, it could be someone else's.

First draw a right angle triangle with 15.5 minutes, convert into radians = 0.004508767 use tan, tan 0.004508767 x 149000000 = 671810.8703 67810.8703 x 2 = 1343621.741 or 1343622 1 dp