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Question

Find length of latus rectum of the parabola y2−2y=−2x−3.

A
2
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B
2
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C
4
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D
4
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Solution

The correct option is A 2
y22y=2x3
Adding 1 on both sides, we get
y22y+1=2x2
(y1)2=2(x1)

Comaring with the standard equation, (yk)2=4a(xh),we get 4a=2
Length of latus rectum =4a=2

So, the answer is option (A).


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