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Grade: 12th pass
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an ellipse with foci (-1,1) and (1,1) passes through centre (0,0) then its equation is
an ellipse with foci (-1,1) and (1,1) passes through centre (0,0) then its equation is

```
3 years ago

## Answers : (1)

Arun
25768 Points
```							Dear student As y coordinates is same. Hence it is clear that it will be a horizontal ellipse or its axis will be parallel to x axis.Mid point of focii is the centre.Hence centre is (0,1). Hence equation of ellipse is:x² /a²  + (y-1)²/b² = 1Now pass it from 0,0You will get a relationship between a and b.And also a*e = 1From b² = a² (1-e²)You will get an relationship between a and b.Now you can easily solve. RegardsArun (askIITians forum expert)
```
3 years ago
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