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horsena [70]
3 years ago
15

Which of the following equations is of an ellipse with x-intercepts of (3, 0) and (-3, 0) and y-intercepts at (0, 1) and (0, -1)

?
Mathematics
1 answer:
lukranit [14]3 years ago
8 0

Answer:

The equation of ellipse is \frac{x^{2} }{9}+\frac{y^{2} }{1}=1

Step-by-step explanation:

Given: An ellipse has

x-intercepts are (-3,0) and (3,0)

y-intercepts are (0,-1) and (0,1)

Let,

Length of major axis of ellipse is 2a and minor axis as 2b

Now,

The distance between two points is given by :

L=\sqrt{(X2-X1)^{2}+(Y2-Y1)^{2}}

The distance between x-intercepts (-3,0) and (3,0) :

X=\sqrt{(X2-X1)^{2}+(Y2-Y1)^{2}}

X=\sqrt{((-3)-3)^{2}+(0-0)^{2}}

X=6

The distance between Y-intercepts (0,-1) and (0,1) :

Y=\sqrt{(X2-X1)^{2}+(Y2-Y1)^{2}}

Y=\sqrt{(0-0)^{2}+((-1)-1)^{2}}

Y=2

Since, X>Y

An ellipse is <em>parallel</em> to x-axis

2a=6 and 2b=2

a=3 and b=1

From the equation of ellipse ;

\frac{x^{2} }{a^{2}}+\frac{y^{2} }{b^{2}}=1

\frac{x^{2} }{3^{2}}+\frac{y^{2} }{1^{2}}=1

\frac{x^{2} }{9}+\frac{y^{2} }{1}=1

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