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Analytical Geometry

Blazing goIITian

 Joined: 10 Oct 2011 Post: 434
19 Jul 2012 22:54:45 IST
3 People liked this
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Let P=(1,1) and Q=(3,2). The point R on the x axis such that PR+RQ is minimum is given by
Engineering Entrance , JEE Main , JEE Main & Advanced , Mathematics , Analytical Geometry

Let P=(1,1) and Q=(3,2). The point R on the x axis such that PR+RQ is minimum is given by (k/3,0), where k =

Blazing goIITian

Joined: 16 May 2012
Posts: 1495
19 Jul 2012 23:10:52 IST
1 people liked this

K=2

Blazing goIITian

Joined: 16 May 2012
Posts: 1495
19 Jul 2012 23:12:28 IST
1 people liked this

whatever is the answer use the concept of similar triangles......it gives the shortest path just like in reflection of light.....it can be derived from fermat's principle......

Blazing goIITian

Joined: 26 May 2010
Posts: 1362
19 Jul 2012 23:15:17 IST
1 people liked this

yup ..exactly ...i used it way back in class XI...thats the best method ..instead of writing the distance and using maxima and minima!

Blazing goIITian

Joined: 10 Oct 2011
Posts: 434
20 Jul 2012 10:07:32 IST
0 people liked this

thnxx both of u:).....but can u plz expolain wat is the concept of similar triangles

New kid on the Block

Joined: 24 Jul 2012
Posts: 14
24 Jul 2012 19:02:09 IST
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i got k=5.

wat is the correct answer and how?

Blazing goIITian

Joined: 1 Apr 2007
Posts: 4025
4 Aug 2012 13:36:28 IST
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New kid on the Block

Joined: 24 Jul 2012
Posts: 14
16 Sep 2012 16:23:48 IST
0 people liked this

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