Question 606649
  <pre><font face = "Tohoma" size = 4 color = "indigo"><b> 
Hi,
Sequence: {5,10,20,40... }
this is a Geometric Sequence: {{{a[n] = a[1]*r^(n-1)}}}
{{{a[n] = 5*2^(n-1)}}}
{{{a[6] = 5*2^(6-1) =5*2^5 = 160 }}}