x^4/(x^2+1) - solution

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Solution for x^4/(x^2+1) equation:

D( x )

x^2+1 = 0

x^2+1 = 0

x^2+1 = 0

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

x^2 = -1

x in (-oo:+oo)

(x^4)/(x^2+1) = 0

1*x^4 = 0 // : 1

x^4 = 0

x = 0

x = 0

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