linda581 linda581
  • 05-03-2017
  • Mathematics
contestada

Write the explicit formula for the geometric sequence a1=-5 a2=20 a3=-80

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camelliaguan3
camelliaguan3 camelliaguan3
  • 05-03-2017

The answer is a(n)=-5Ɨ(-4)nāˆ’1.

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