web2.0calc
 
+0  
 

​ help please.

0
572
1
avatar+361 

help :(

 May 1, 2018

1+0 Answers

 #1
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0

∑[4*(-5)^(n - 1)], n=1 to 6 = - 10,416

 May 1, 2018

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