4/x=90

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Solution for 4/x=90 equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

4/x = 90 // - 90

4/x-90 = 0

4*x^-1 = 90 // : 4

x^-1 = 45/2

-1 < 0

1/(x^1) = 45/2 // * x^1

1 = 45/2*x^1 // : 45/2

2/45 = x^1

x = 2/45

x = 2/45

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