(1/(x^2))=49

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Solution for (1/(x^2))=49 equation: 


D( x )

x^2 = 0

x^2 = 0

x^2 = 0

1*x^2 = 0 // : 1

x^2 = 0

x = 0

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

1/(x^2) = 49 // - 49

1/(x^2)-49 = 0

1*x^-2 = 49 // : 1

x^-2 = 49

-2 < 0

1/(x^2) = 49 // * x^2

1 = 49*x^2 // : 49

1/49 = x^2

x^2 = 1/49 // ^ 1/2

abs(x) = 1/7

x = 1/7 or x = -1/7

x in { 1/7, -1/7 }

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