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Use sigma notation to represent the following series for the first 12 terms.

2 +(-8) +32 + (-128) + ......

 May 2, 2018
 #1
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∑[ (-1)^(n + 1) 2^(2n - 1)], n=1 to 12 = - 6,710,886

 May 2, 2018
 #2
avatar+20831 
+1

Use sigma notation to represent the following series for the first 12 terms.
2 +(-8) +32 + (-128) + ......

 

\(\displaystyle -\frac{1}{2}\sum \limits_{n=1}^{12}(-4)^n\)

 

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 May 3, 2018

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