Homework Help: math

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

The sum of the first 9 terms of an A.P is 72 and the sum of the next 9 terms is 71, find the A.P

math (?) - PsyDAG, Friday, October 28, 2011 at 11:00am
I don't know what "A.P" means.
math - Steve, Friday, October 28, 2011 at 11:33am
Sure you do. :-)

The question
a) is obviously about an arithmetic progression
b) has already been posted three times!?!?!?!!?

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