Write an equation to describe the sequence below. Use n to represent the position of a term in the sequence, where n = 1 for the first term.
-25/7, 75/28, -225/112, …
The sequence can be represented by the equation:
(-1)^(n+1) * (75/28) * (3/2)^(n-1)
where n represents the position of a term in the sequence.