Question 628220
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
Geometric Sequence: {16,-8,4,-2,1...}  r = -1/2
{{{a[n] = a[1](-1/2)^(n-1)}}}
{{{a[6] = 16(-1/2)^5)}}}
{{{a[7] = 16(-1/2)^6)}}}
{{{a[8] = 16(-1/2)^7)}}}