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Question

The equation of an ellipse is given in its standard form as 16x2+y2=16, then the length of the latus rectum is,

A
14
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B
12
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C
4
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D
2
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Solution

The correct option is B 12
Equation of ellipse given, 16x2+y2=16

Dividing both sides by 16

x21+y216=1

Comparing with, x2a2+y2b2=1

a2=1a=1 and b2=16b=4(b>a)

Length of the latus rectum =2a2b=2×14=12

Hence option B is the answer.

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