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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
1/x-8 = 14 // - 14
1/x-14-8 = 0
1*x^-1 = 22 // : 1
x^-1 = 22
-1 < 0
1/(x^1) = 22 // * x^1
1 = 22*x^1 // : 22
1/22 = x^1
x = 1/22
x = 1/22
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