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arithmetic

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Find the sum of the 25th term to 50th term of the arithmetic progression 28,23,18, ...

  • arithmetic - ,

    You have an AS where a=28 and d= -5

    Find the sum of the first 50 terms using your formula, and then the sum of the first 24 terms.
    Subtract the two.

    (you should get 7525 - 2052 = 5473 )

  • arithmetic - ,

    The progression lists stops on the downtown 1 train in New York. The next number in the sequence is 14, but that's the last numeric stop.

    Try a real New York high school exam question: Complete the progression:
    4,14,34,42,blank, blank.

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