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DLS
 3 years ago
If P(3,2) is one end of the focal chord PQ of the parabola y^2+ 4x + 4y =0, then the slope of the normal at Q is:
(A) 1/2. (B) 2. (C) 1/2. (D) 2
DLS
 3 years ago
If P(3,2) is one end of the focal chord PQ of the parabola y^2+ 4x + 4y =0, then the slope of the normal at Q is: (A) 1/2. (B) 2. (C) 1/2. (D) 2

This Question is Closed

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1Whats your progress ?

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0\[\LARGE (y+2)^{2}=4(1x) \] so vertex=(1,2)

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0this diagram is not possible :/ acc to what im thinking..

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0\[\LARGE 2y \frac{dy}{dx}+4+4\frac{dy}{dx}=0\] i do everything i know :P because i dont know exactly what to do :o

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0\[\LARGE \frac{dy}{dx}=\frac{4}{2y+4}\]

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0for normal it will be .. \[\LARGE \frac{2y+4}{4}=\frac{8}{4}\] =2?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1okay, vertex is (1,2)

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1focus would have been (1,0) if vertex had been (0,0)

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1because of this shifting, new vertex = ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1shift (1,0) 1 unit to the right and 2 units down

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0that's what i wrote earlier :P

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1now you have eqn of line PQ

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1find coordinate of Q

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1P(3,2) F(2,2) slope = 4/5

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1so slope = 4/5 eqn of line = ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1eqn of parabola = y^2 + 4x+ 4y =0 eqn of line = 5y + 4x + 2 =0 solve both to solve for Q

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1Note that you'll obtain 2 solutions from here, 1 should easily be (3,2)

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1So its easy, form a quadratic, use sum of roots thing, you already know (3,2) is a solution, just find other coordinate

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0abe yaar short method bata :P i took the wrong road nvm

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1Arey ho to gaya hai, bas Q nikalna hai,

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0why are we solving both the equations together? Q doesn't lie on parabola does it?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1Ofcorse it does! PQ is the focal chord

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0but P doesn't lie on parabola?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1Of course it does, what are you saying!

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0but logically when I saw.. Vertex=(1,2) P=(3,2) how big is the parabola :X

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1are you sleep deprived? o.O

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1I don;t understand your query

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0dw:1359795719275:dw how does it lie on the parabola? forget the substi. method for a while

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1dw:1359795779003:dw

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0that would happen if \[\LARGE y^2=4ax\]

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1So, shall we find Q now ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1just forma quad, rest is easy

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1y^2 + 4x+ 4y =0 5y + 4x + 2 =0 =>4x = 5y 2 make that substitution

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1Okay, one root of this is 2,right ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1use sum of roots or any other legit method, find other root.

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1actually we needn;t find x,

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1slope of normal = (2y+4)/4

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1tumhi ne to upar differentiate karke nikala tha

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0i dont want to live on this planet anymore

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0why did we do all this then?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1We had to find y coordinate of Q

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.14/(2y+4) ye tangent ka hai, right?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1slope of tangent * slope of normal = 1

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1abhi bhi confidence nahi aya?

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0dont say 1/2 dil tut jaega :'(

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0answer to wahi hai be :P 1/2

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0http://www.goiit.com/posts/list/geometrysimpleparabolaquestion14790.htm

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1usme kya uqes hai aur tumne kya copy kiya hai! :3

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1parabola ka eqn dekho

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1abe parabola ka eqn dekho

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1y^2 + 4x + 4y =0 tumne likha hai y^2 + 4x + 4 =0 hai

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0\[\LARGE \frac{4}{4+4}\] that s what i got in last in register

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0myequation is right!! 101% ques might be different..

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0issi Q ke hisb se 1/2 aya hai

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1ha, uska ans 1/2 hoga, lekin iska 1/2 hai.

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1kon se saal ka hai ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1mujhe to nahi lag raha abhi tak kahi koi galti ki hai ?

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1(y+2)^2 = 4(1)((x1) vertex = (1,2) focus was (1,0) for vertex (0,0) so new focus will be (0,2)

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1eqn of line = (y2) = m(x+3)

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0http://www.theparentingdad.com/wpcontent/uploads/2012/08/babyfacepalm.jpg

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0wait i didnt get the focus thing :/

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1focus (1,0) hoga y^2 = 4ax me

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1ham (1,0) like kar rahe the

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1y^2 + 4x + 4y =0 and 4x = 63y => y^2 + y 6 =0 1 ans hai 2, dusra ho jayega 3

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1ab slope of normal = 4/(2y+4) = 2 hahahha

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0par kya hai ke na focus wala part smaj nahi aya :P

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1ye ques repost karo firse, koi expert batayega, ise close kar do

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0do we have a greater expert than you ?:P

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0BOLNA dhang se focus wala bus :'(

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1y^2 = 4ax ke type ka hai hamara eqn

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1waha focus (1,) hota hai jab vertex (0,0) hota hai.

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1yaha vertex (1,2) hai

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1to focus (1+1 , 02) = (0,2)

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1wait wait, 1/2 aa to raha hai!

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1(2y+4)/4 y=3 slope = 1/2

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1last me thora pagla gaya tha mai, ho to gaya, 1/2

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0"nahi hamara answer sahi hai :p "

shubhamsrg
 3 years ago
Best ResponseYou've already chosen the best response.1focus toot gaya tha! :

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0mai kar raha hoon dubara bus hogaya..1m..BC 1 ghanta hogya :/

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0ahaaa maza agaya :P mast Q :P

DLS
 3 years ago
Best ResponseYou've already chosen the best response.0chal lunch:P thanda hogaya :/
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