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Find the sum of the sigma.


label Mathematics
account_circle Unassigned
schedule 0 Hours
account_balance_wallet $5

The index of summation is k=0. 

The upper limit of summation is 4, and the expression attached with the sigma is: 

(-1)^k 

k + 1

Calculator is allowed. 

Nov 18th, 2017

Please, I can re-write your sum as below:

(-1)^1/(1+1)+ (-1)^2/(2+1)+ (-1)^3/(3+1)+ (-1)^4/(4+1)=

=-1/2+ 1/3 - 1/4 + 1/5=(-30+20-15+12)/60=

= -13/60.

Reassuming, your sum is equal to -13/60

Jan 27th, 2015

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Nov 18th, 2017
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