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Mathematics, 18.08.2021 17:10 wirchakethan23

Evaluate the sum of geometric series below: \displaystyle \large{ \sum_{k = 1}^n (4  \cdot  {3}^{k} -  {2}^{k + 1})  }
Please also show your work too. Thank you!​

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Evaluate the sum of geometric series below:
Please also show your work too. Thank you!​...
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