Write an explicit formula for a, start subscript, n, end subscripta

n

, the n, start superscript, th, end superscriptn
th
term of the sequence 50, comma, 10, comma, 2, comma, point, point, .50,10,2,....

The sequence can be represented as an explicit formula:

a_n = 50 * (1/5)^(n-1)

where n is the term number.