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Integral Calculus

Hot goIITian

 Joined: 17 Nov 2008 Post: 137
8 Apr 2009 16:50:50 IST
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Assertion and reasoning
Engineering Entrance , JEE Main , JEE Advanced , Mathematics , Integral Calculus

statement-1: If the distances of a point Pfrom te line x+y+2=0 and point (3,4) are same then the locus P will be a parabola.

Statement-2: If the distances of a point P from  a fixed line and a fixedpoint are same then the locus of P will be a parabola.

explain why u feel the answer is A or B or C or D

New kid on the Block

Joined: 7 Apr 2009
Posts: 27
8 Apr 2009 17:03:37 IST
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Ans is c as the locus is a parabola if the point doesn't lie on the given line.

if the fixed point lies on the fixed line, then the locus is perpendicular to line at dat point

New kid on the Block

Joined: 7 Apr 2009
Posts: 27
8 Apr 2009 17:03:57 IST
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is it the ans

Blazing goIITian

Joined: 24 Dec 2007
Posts: 1111
8 Apr 2009 17:04:04 IST
1 people liked this

A right R wrong....Reason shud be "point P from a fixed line and a fixedpoint NOT ON THE LINE are same"....as can be seen 3,4 doesn't lie on the line x+y+2=0 so it indeed gives a parabola....

hope this helps....cheers!!

Whoops Sorry Nikhil........Din't see ur post.......See the time difference in our replies (less than 20 seconds!!!!)

Hot goIITian

Joined: 17 Nov 2008
Posts: 137
8 Apr 2009 17:06:06 IST
0 people liked this

yes the answer is right, thank u

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