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KEAM 2019 Math Paper
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© examsnet.com
Question : 67
Total: 121
The length of the latusrectum of an ellipse is - of the major axis. Its eccentricity would be 2
√
2
1
√
2
2
1
None of these
Validate
Solution:
Given,
2
b
2
a
=
1
2
(
2
a
)
⇒
2
b
2
=
a
2
⇒
2
a
2
(
1
−
e
2
)
=
a
2
⇒
2
(
1
−
e
2
)
=
1
⇒
2
−
2
e
2
=
1
⇒
c
=
1
√
2
© examsnet.com
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