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September 21, 2014

September 21, 2014

Posted by **Tejiri** on Saturday, September 10, 2011 at 5:25pm.

- Maths -
**Mgraph**, Saturday, September 10, 2011 at 10:06pmB3=20

The sum=B1/(1-q)=3*B1 =>q=2/3

B3=B1*q^2

20=B1*4/9 =>B1=45

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