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Permalink Submitted by Jayanta Boral (not verified) on 12 May, 2017

I think there is a small mistake here.
S1+S2=2+2+2+...
So, S1+1/2=2S1 Therefore S1=+1/2

Interestingly Also S1-S2=2+2+2+...=2S1 or S1=-S2=-1/2 we get your result.

Thanks

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