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1/6n(n+1)(n+2)=100
We move all terms to the left:
1/6n(n+1)(n+2)-(100)=0
Domain of the equation: 6n(n+1)(n+2)!=0We multiply parentheses ..
n∈R
1/6n(+n^2+2n+n+2)-100=0
We multiply all the terms by the denominator
-100*6n(+n^2+2n+n+2)+1=0
Wy multiply elements
-600n(++1=0
We use the square of the difference formula
-600n(+1=0
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