Ejemplo recta tipo de intervalo abierto

Intervalo abierto

Se representa mediante una expresión del tipo a < x < b ó (a;b). Por ejemplo, si tenemos el intervalo abierto (1;5), tendremos el conjunto de números mayores a 1 y menores que 5. Sin incluir el 1 y el 5. Representación en la recta real del intervalo abierto (a;b).

Step-by-step explanation:

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step-by-step explanation:

the orientation of the parabolas can easily be found by analysing the power of x and y and their signs. if x is squared , parabola opens up and also if its coefficient is negative it opens down. if y is squared , the parabola opens right and also if its coefficient is negative it opens left. however in order to do the above analysis our equation must be in standard form .

our parabola is

which is not standard form of any parabola . hence we square on both hand side and convert it into standard form.

hence we see that x is squared and its coefficient is non negative . there for it opens up.

x = 23.78

step-by-step explanation: