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प्रश्न
Select the correct option from the given alternatives:
If the line 4x − 3y + k = 0 touches the ellipse 5x2 + 9y2 = 45 then the value of k is
पर्याय
+ 21
`± 3sqrt(21)`
+ 3
+ 3(21)
उत्तर
If the line 4x − 3y + k = 0 touches the ellipse 5x2 + 9y2 = 45 then the value of k is `± 3sqrt(21)`
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संबंधित प्रश्न
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- co-ordinates of the foci
- equations of directrices
- length of the latus rectum
- distance between foci
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