# Math Help - ooh a tricky question

1. yea thanks got it!!
you are superb

please solve this also if you can
http://www.mathhelpforum.com/math-he...ne-155137.html
sanjay

2. Originally Posted by grgrsanjay
what have you used to get that formula??
x, y and z are infinite geometric series and sum the series is a/(1-r), where a is the first term and r is the common ratio.

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