ExamBro
ExamBro
JEE Advanced · Mathematics · 12. Circle

A line y=mx+1 intersects the circle x-32+y+22=25 at the points P and Q. If the midpoint of the line segment PQ has x-coordinate -35, then which one of the following options is correct?

  1. A 6m<8
  2. B 2m<4
  3. C 4m<6
  4. D -3m<-1
Verified Solution

Answer & Solution

Correct Answer

(B) 2m<4

Step-by-step Solution

Detailed explanation



Equation of line PQ:y=mx+1

Let R be the mid point of PQ, so its x-coordinate of midpoint =-35

Hence, coordinates of midpoint R-35,-3m5+1

Let centre of circle is O3,2

Since, perpendicular dropped from centre upon any chord divides it in two equal parts.

Hence, line PQ will be perpendicular to RO

mRQmRO=-1

m-3m5+1+2-35-3=-1

m-3m+15-18=-1

m2-5m+6=0

m=2, 3 2m<4
Same subject
Explore more questions on app
From JEE Advanced
Explore more questions on app