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1/n+1/n+1-2/n-1=0
Domain of the equation: n!=0We add all the numbers together, and all the variables
n∈R
1/n+1/n-2/n=0
We multiply all the terms by the denominator
1+1-2=0
We add all the numbers together, and all the variables
=0
n=0/1
n=0
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