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Question

Determine position of a point (2,3) with respect to the ellipse x216+y225=1.

A
Outside
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B
Inside
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C
On the ellipse
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D
None of the above
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Solution

The correct option is B Inside

Given equation is x216+y225=1

x216+y2251=0

The curve is defined by,

f(x,y)=x216+y2251f(2,3)=(2)216+(3)2251f(2,3)=14+9251=25+36100100=39100f(2,3)<0

So, the point lies inside the ellipse.

Option B is correct.


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