9/4-9/x

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Solution for 9/4-9/x equation: 


D( x )

x = 0

x = 0

x = 0

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

9/4-(9/x) = 0

9/4-9*x^-1 = 0

-9*x^-1 = -9/4 // : -9

x^-1 = 1/4

-1 < 0

1/(x^1) = 1/4 // * x^1

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

4 = x^1

x = 4

x = 4

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