Homework Help Forum: Math (Algebra/Pre-Algebra)

Posted by Samantha on Thursday, June 4, 2009 at 9:11pm.

What is the 23rd term in the arithmetic sequence: 11, 14, 17, 20...? All I need is the formula to find the it because I have to show work. Thanks.

• Math (Algebra/Pre-Algebra) - Reiny, Thursday, June 4, 2009 at 9:35pm

  if a is the first term and d is the common difference then Term(n) = a + (n-1)d

  
  

• Math (Algebra/Pre-Algebra) - Samantha, Thursday, June 4, 2009 at 9:44pm

  thanks =]

  
  

• Math (Algebra/Pre-Algebra) - Samantha, Thursday, June 4, 2009 at 9:50pm

  so a = 11 and d = 3, so 23 = 11 + (23-1) 3. The 23rd term is 77 because 11 + 22(3) = 77 =]

  
  

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