4=7.2/x

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Solution for 4=7.2/x equation: 


D( x )

x = 0

x = 0

x = 0

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

4 = 7.2/x // - 7.2/x

4-(7.2/x) = 0

4-7.2*x^-1 = 0

-7.2*x^-1 = -4 // : -7.2

x^-1 = 0.55555556

-1 < 0

1/(x^1) = 0.55555556 // * x^1

1 = 0.55555556*x^1 // : 0.55555556

1.79999999 = x^1

x = 1.79999999

x = 1.79999999

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