(x^2-49)/(7x^4)

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Solution for (x^2-49)/(7x^4) equation: 


D( x )

7*x^4 = 0

7*x^4 = 0

7*x^4 = 0

7*x^4 = 0 // : 7

x^4 = 0

x = 0

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

(x^2-49)/(7*x^4) = 0

1*x^2 = 49 // : 1

x^2 = 49

x^2 = 49 // ^ 1/2

abs(x) = 7

x = 7 or x = -7

x in { 7, -7 }

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