I.  Write the recursive formula for each sequence. Then write the next two terms.       2.    2, 6, -18, - 54, ...

II.  Write the explicit formula for each sequence. Then write the next two terms.
      3.    5, 8, 11, 14, ...

      4.    1/3,1/4,1/5,1/6...

III. Use the given recursive formula to find the next four terms of the sequence.
     5.   a1 = 4,     an – 1 + 7

IV. Use the given explicit formula to find the next four terms of the sequence.
     6. an = 2(n)2 - 3