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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x-10 = -32 // + 32
2/x-10+32 = 0
2*x^-1 = -22 // : 2
x^-1 = -11
-1 < 0
1/(x^1) = -11 // * x^1
1 = -11*x^1 // : -11
-1/11 = x^1
x = -1/11
x = -1/11
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