# ARITHMETIC SEQUENCE2 HELP!!!

For the sequence an=2−5(n−1),
its first term is ;
its second term is ;
its third term is ;
its fourth term is ;
its fifth term is ;
its common difference d= .

### Comments for ARITHMETIC SEQUENCE2 HELP!!!

 Apr 18, 2011 Arithmetic Sequence 2 ā nth term by: Staff The question: For the sequence an=2−5(n−1), its first term is ; its second term is ; its third term is ; its fourth term is ; its fifth term is ; its common difference d= . The answer: An arithmetic sequence has the form: a_n = a_1 + (n - 1) * (d) a_n = a with a subscript of n (this is the nth term in the series) a_1 = a with a subscript of 1 (this is the 1st term in the series) n = number of terms d = difference between consecutive terms Computing terms in the sequence for your problem a_n = 2 - 5(n - 1) its first term is (n = 1): a_1 = 2 - 5(1 - 1) = 2 - 5*0 = 2 its second term is (n = 2): a_2 = 2 - 5(2 - 1) = 2 - 5*1 = -3 its third term is (n = 3): a_3 = 2 - 5(3 - 1) = 2 - 5*2 = -8 its fourth term is (n = 4): a_4 = 2 - 5(4 - 1) = 2 - 5*3 = -13 its fifth term is (n = 5): a_5 = 2 - 5(5 - 1) = 2 - 5*4 = -18 its common difference d = -5. Thanks for writing. Staff www.solving-math-problems.com