1/2n(n+1)=66

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Solution for 1/2n(n+1)=66 equation: 



1/2n(n+1)=66

We move all terms to the left:

1/2n(n+1)-(66)=0



Domain of the equation: 2n(n+1)!=0

n∈R



We multiply all the terms by the denominator


-66*2n(n+1)+1=0

Wy multiply elements

-132n(n+1=0

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