Respuesta :

sqdancefan

Answer:

  an = 8·(1/2)^(n-1)

Step-by-step explanation:

The first value is a1 = 8 and the common ratio is r = 1/2, so the formula is ...

  an = a1·r^(n-1)

  an = 8·(1/2)^(n-1)

  an = 2^(4-n) . . . . . . more compact version