Question 1120323
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*[tex \Large S_2\ =\ 20\ \Right\ a\ +\ ar\ =\ 20]


*[tex \Large S_3\ =\ 65\ \Right\ a\ +\ ar\ +\ ar^2\ =\ 65]


*[tex \Large ar^2\ =\ 45]


*[tex \Large 45\ =\ 5\ \times\ 9\ =\ 5\ \times\ 3^2]


So


*[tex \Large a\ =\ 5] and *[tex \Large r\ =\ 3]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ S_2\ =\ 5\ +\ 15]


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ S_3\ =\ 5\ +\ 15\ +\ 45]


First three terms are 5, 15, and 45
								
								
John
*[tex \LARGE e^{i\pi}\ +\ 1\ =\ 0]
My calculator said it, I believe it, that settles it
<img src="http://c0rk.blogs.com/gr0undzer0/darwin-fish.jpg">
*[tex \Large \ \
*[tex \LARGE \ \ \ \ \ \ \ \ \ \  
								
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