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D( x )
n-7 = 0
n^2-(13*n)-20 = 0
n-7 = 0
n-7 = 0
n-7 = 0
x naleu017Cy do R
n^2-(13*n)-20 = 0
n^2-(13*n)-20 = 0
n^2-13*n-20 = 0
n^2-13*n-20 = 0
x naleu017Cy do R
x belongs to the empty set
(n^2*v-(10*n)+24)/(n^2-(13*n)-20)-(9/(n-7)) = 0
x belongs to the empty set
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