EN - 2015 - CÁLCULO - f ( x ) = x + √ ( | x | )

#NavalSchool #Integral_Calculus #Differential_Calculus Consider the real function of a real variable f(x) = x + √(|x|). For what values ​​of the real constant k does the equation f(x) = k have exactly 3 real roots? a) k less than -1/2 b) -1/4 less than k less than 1/4 c) k greater than 1/2 d) -1/4 less than k less than 0 e) 0 less than k less than 1/4