b1,b2,b3,......In the geometric sequence above, b1=1000 and bn=(2/3)bn-1 for all n[tex]\geq[/tex]2. What is the least value of k for which bk<0.001? 3. The attempt at a solution What I did first was I found what b0 is since we are given b1 and that is 1500. But I do not understand where the k is coming from and what needs to be found. Can someone please help me? Thank you!