For the given circles 5x2+y2−6x−2y+1=0 and x2+y2+2x−8y+13=0 which of the following is true?
see full answer
Your Exam Success, Personally Taken Care Of
1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.
An Intiative by Sri Chaitanya
a
One circle lies inside the other
b
One circle lies completely outside the other
c
Two circles intersection in two points
d
They touch each other externally
answer is D.
(Unlock A.I Detailed Solution for FREE)
Best Courses for You
JEE
NEET
Foundation JEE
Foundation NEET
CBSE
Detailed Solution
The centres of the given circles are C1(3,1) and C2(−1,4) and corresponding radii are r1=32+12−1=3and r=(−1)2+42−13=2 respectively.Now C1C2=(3+1)2+(1−4)2=5Clearly, C1C2=(3+1)2+(1−4)2=5So, given circles touch each other externally.