Anonymous
Anonymous asked in Science & MathematicsMathematics · 1 month ago

List the first 3 terms of the arithmetic sequence if the 25th term is 35 and the 30th term is 5?

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  • 1 month ago

     The first 3 terms of the arithmetic sequence 

     if the 25th term is 35 and the 30th term is 5:

     221, 215, 185 

     a_n = 227 - 6 n 

     

  • david
    Lv 7
    1 month ago

    5 = 35 + d(4)

      d = -7.5

    35 = a + -7.5(24)

      a = 215

     

     215, 207.5, 200  <<  1st 3 trms

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