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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
10/x+2 = (10*x)/x+14 // - (10*x)/x+14
10/x-((10*x)/x)-14+2 = 0
10/x-14-10+2 = 0
10*x^-1 = 22 // : 10
x^-1 = 11/5
-1 < 0
1/(x^1) = 11/5 // * x^1
1 = 11/5*x^1 // : 11/5
5/11 = x^1
x = 5/11
x = 5/11
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