100-(49/x^2)

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Solution for 100-(49/x^2) 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)

100-(49/(x^2)) = 0

100-49*x^-2 = 0

-49*x^-2 = -100 // : -49

x^-2 = 100/49

-2 < 0

1/(x^2) = 100/49 // * x^2

1 = 100/49*x^2 // : 100/49

49/100 = x^2

x^2 = 49/100 // ^ 1/2

abs(x) = 7/10

x = 7/10 or x = -7/10

x in { 7/10, -7/10 }

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