find the equation of set of points P such that PA2 +PB2=2K2 ,where A&B are the points (3,4,5) and (-1,3-7) respectively

 hey.. i think it's frm NCERT...!! isn't it..??

here's d answr..!

Let the coordinates of point P be (x, y, z).

Here PA sq = (x – 3)+ (y – 4)2+ ( z – 5)2

PB = (x + 1)2 + (y – 3)2 + (z + 7)2

By the given condition PA2+ PB2 = 2k2, we have

(x – 3)2 + (y – 4)2+ (z – 5)2 + (x + 1)2+ (y – 3)+ (z + 7)2 = 2k2

i.e., 2x2+ 2y2 + 2z2 – 4x – 14y + 4z = 2k2 – 109.

hope i helped.. :) :)

  • 8

 plzzz any 1 anzz this 

  • -2

Dear Student!

@suspense: Very good! Keep posting!. Here is a thumbs up for you.

Cheers!

  • -5

thankz thumpz up

  • -3

 ohh.. wlxx yaaarr..!! nythng for frnzz...!! :) :)

  • -3

thnnxxx sir...!!  :)

  • -2

 hm ok

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