Classify each sequence as arithmetic, geometric, or neither.
Arithmetic
Geometric
Neither
Sort the the following
{7, 4, 1, -2, ...}
(64, 32, 16, 8, ...}
{1, 3, 7, 13, ...}
(2, 4, 6, 8, ...}
{4, 5, 9, 14, ...}
{–1, 3, –9, 27, –81, ...}