Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8

Q.

If foci of an ellipse be (-1, 2) and (-2, 3) and its tangent at a point A is 2x+3y+9=0

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya

a

Co-ordinate of the point ‘A’ will be 329,1727  

b

Distance between the foci is 22

c

Product of the perpendiculars from foci to any tangent is 56

d

Length of the minor axis of the ellipse will be 214

answer is A, B.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

detailed_solution_thumbnail

P(1,2) and Q(2,3)
Hence image of point P from lie 2x + 3y + 9 = 0
x+12=y23=22+6+913X=5;  y=4P=(5,4)
Now length of PQ =9+49=58=2aa=582
We know that,  2ae = PQ
2ae=2ae=12a2e2=12
b2=a2(1e2)
b2=58412b2=5824b2=564b=14
b2=14 length of minor axis =214=56
Equation of line PQ is
(y3)=433(x+2)
3y  9 = 72 + 14
7x  3y + 23 = 0
On solving  we get 7x  3y + 23 = 0 and 2x + 3y + 9 = 0 
we get 329,1727
 

Watch 3-min video & get full concept clarity

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon
If foci of an ellipse be (-1, 2) and (-2, 3) and its tangent at a point A is 2x+3y+9=0