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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
-14 = -(3/x)-22 // + -(3/x)-22
3/x-14+22 = 0
3*x^-1 = -8 // : 3
x^-1 = -8/3
-1 < 0
1/(x^1) = -8/3 // * x^1
1 = -8/3*x^1 // : -8/3
-3/8 = x^1
x = -3/8
x = -3/8
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