Describe the sequence of transformations that would take the graph of f(x)=x² to each parabola described below. Focus: (1/4,0),directrix: x=-1/4

Respuesta :

Answer:

The parabola obtained is x=y²

Step-by-step explanation:

Given the focus (1/4,0) and directrix: x=-1/4

A point on the parabola is determined by the distance of that point with the focus and with the directrix:

Distance between the parabola and the directrix:[tex]\sqrt{(x+\frac{1}{4})^{2}  }[/tex]

Distance between the parabola and the focus:[tex]\sqrt{(x-\frac{1}{4})^{2} +(y-0)^{2} }[/tex]

[tex]\sqrt{(x+\frac{1}{4})^{2}}[/tex]=[tex]\sqrt{(x-\frac{1}{4})^{2} +(y-0)^{2} }[/tex]

[tex](x+\frac{1}{4})^{2}[/tex]=[tex](x-\frac{1}{4})^{2} +(y-0)^{2} [/tex]

[tex]x^2+\frac{1}{2} x+\frac{1}{16} = x^2-\frac{1}{2} x+\frac{1}{16} + y^{2}[/tex]

[tex]\frac{1}{2} x=-\frac{1}{2} x + y^{2}[/tex]

[tex]\frac{1}{2} x+\frac{1}{2} x = y^{2}[/tex]

x=y²

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