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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 (?) -

    I don't know what "A.P" means.

  • math -

    Sure you do. :-)

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

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