Hi  

arithmetic sequence: 3, 5, 7...

   | d = 2

 27 = 3 + (n-1)2

 27 = 3 + 2n - 2

  26 = 2n

  13 = n

Which term of the arithmetic sequence : 3, 5, 7...is equal to 27  term

 arithmetic sequence: 3, 5, 7,9,11,13,15,17,19,21,23,25,27.... 

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