Question: Consider the geometric sequence1, b , b 2 , b 3 , ... If we write S k for the sum of the first k

Consider the geometric sequence1,b,b2,b3, ... If we writeSkfor the sum of the firstkterms of the sequence, what isbS5?

  • bS5=b6+b5+b4+b3+b2+b
  • bS5=b6+b5+b4+b3+b2+b+1
  • bS5=b5+b4+b3+b2+b
  • bS5=b5+b4+b3+b2+b+1
  • bS5=b4+b3+b2+b
  • bS5=b7+b6+b5+b4+b3+b2+b

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