DO YOU KNOW SUM OF 1-1+1-1+1-...........=1/2

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psuedo math.....

DO YOU KNOW SUM OF 1-1+1-1+1-...........=1/2

》  s=1-1+1-1+1-........
now multiply by minus sign
-s=-1+1-1+1-1+........
now add 1on both side
1-s=1-1+1-1+1-.......
rhs value is equal to s then
1-s=s
2s=1
s=1/2

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