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What is the sum of the finite arithmetic series -10, -8, -6, -4, ... 24?

 Oct 24, 2017
 #1
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We have 

 

(-10 + 24)  + (-8 + 22)  + (-6 + 20)  .........(6 + 8)

 

9 pairs of numbers where each pair sums to 14    =  9(14)   = 126

 

cool cool cool

 Oct 24, 2017

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