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Analytical Geometry

Blazing goIITian

Joined:	10 Oct 2011
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19 Jul 2012 22:54:45 IST

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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 =

Comments (7)

Janardhan K

Blazing goIITian

Joined: 16 May 2012

Posts: 1495

19 Jul 2012 23:10:52 IST

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K=2

Janardhan K

Blazing goIITian

Joined: 16 May 2012

Posts: 1495

19 Jul 2012 23:12:28 IST

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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......

rajat sharma

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Joined: 26 May 2010

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19 Jul 2012 23:15:17 IST

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

PALASH

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20 Jul 2012 10:07:32 IST

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

sravs

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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?

plz reply

Vikram Saxena

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4 Aug 2012 13:36:28 IST

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answer is k=6

sravs

New kid on the Block

Joined: 24 Jul 2012

Posts: 14

16 Sep 2012 16:23:48 IST

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please explain how

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