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April 20, 2014

April 20, 2014

Posted by **Anonymous** on Friday, October 28, 2011 at 5:53am.

- math (?) -
**PsyDAG**, Friday, October 28, 2011 at 11:00amI don't know what "A.P" means.

- math -
**Steve**, Friday, October 28, 2011 at 11:33amSure you do. :-)

The question

a) is obviously about an arithmetic progression

b) has already been posted three times!?!?!?!!?

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