Write a geometric series for which r = ½ and n = 4, math homework help

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Write a geometric series for which r = ½ and n = 4, math homework help

  1. OPEN ENDED Write a geometric series for which r = ½ and n = 4.
  2. Writing in Math Use the information on page 663 attached below to explain how e­mailing a joke is related to 
    a geometric series. Include an explanation of how the situation could be changed to make it 
    better to use a formula than to add terms.