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D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
37/x = 2.25 // - 2.25
37/x-2.25 = 0
37*x^-1 = 2.25 // : 37
x^-1 = 0.06081081
-1 < 0
1/(x^1) = 0.06081081 // * x^1
1 = 0.06081081*x^1 // : 0.06081081
16.44444466 = x^1
x = 16.44444466
x = 16.44444466
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