x/(4x^2-81)

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Solution for x/(4x^2-81) equation: 


D( x )

4*x^2-81 = 0

4*x^2-81 = 0

4*x^2-81 = 0

4*x^2 = 81 // : 4

x^2 = 81/4

x^2 = 81/4 // ^ 1/2

abs(x) = 9/2

x = 9/2 or x = -9/2

x in (-oo:-9/2) U (-9/2:9/2) U (9/2:+oo)

x/(4*x^2-81) = 0

x = 0

x = 0

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