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Rainbow [258]
3 years ago
10

Write an equation for an ellipse centered at the origin, which has foci at (\pm5,0)(±5,0)(, plus minus, 5, comma, 0, )and vertic

es at (\pm\sqrt{41},0)(± 41 ​ ,0)(, plus minus, square root of, 41, end square root, comma, 0, ).
Mathematics
1 answer:
Virty [35]3 years ago
7 0

Answer:

The equation of ellipse is

\frac{x^2}{41}+\frac{y^2}{16}=1

Step-by-step explanation:

The equation of an ellipse is

\frac{(x-h)^2}{a^2}+\frac{(y-k)^2}{b^2}=1

where(h,k) is the center and c is distance from the center to the foci is given by a^2-b^2=c^2. a is the distance from the center to the vertices and b is the distance from the center to the co-vertices.

The center of the ellipse is the mid-point of the vertices.

The mid point of the vertices (\pm\sqrt{41},0) is

=(\frac{\sqrt{41}+(-\sqr{41})}2,\frac{0+0}2)

=(0,0)

a is the distance between the center and the vertices.

So, a=\sqrt{(0-\sqrt{41})^2+(0-0)^2}

        =\sqrt{41}

c is the distance between the center and the foci.

So, c=\sqrt{(0-5)^2+(0-0)^2

         =5

a^2-b^2=c^2

\Rightarrow (\sqrt41)^2-b^2=5^2

\Rightarrow b^2=(\sqrt41)^2- 5^2

\Rightarrow b^2=41-25

\Rightarrow b^2=16

The equation of ellipse is

\frac{(x-0)^2}{(\sqrt{41})^2}+\frac{(y-0)^2}{16}=1

\Rightarrow \frac{x^2}{41}+\frac{y^2}{16}=1

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