EmmittDesloge
EmmittDesloge EmmittDesloge
  • 11-07-2015
  • Mathematics
contestada

Write the explicit formula that represents the geometric sequence -2, 8, -32, 128

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Benjamin16
Benjamin16 Benjamin16
  • 11-07-2015
[tex]a_{1}=-2 \\ \\ a_{2}=8 \\ \\ q= \frac{a_{2}}{a_{1}} \\ \\ q= \frac{8}{-2}=-4 \\ \\ a_{n}=a_{1}*q^{n-1} \\ \\ a_{n}=-2*-4^{n-1} [/tex]
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