The First Four Terms of a Sequence Are Given $1 , - \frac { 3 } { 2 } , 2 , - \frac { 5 } { 2 }$

Short Answer

The first four terms of a sequence are given. Determine whether they can be terms of an arithmetic sequence, a geometric sequence, or neither. If the sequence is arithmetic find the common difference. If the sequence is geometric find the common ratio. $1 , - \frac { 3 } { 2 } , 2 , - \frac { 5 } { 2 }$