wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

A circle x2+y2+2gx+2fy+c=0 passing through (4, 2) is concentric to the circle x2+y22x+4y+20=0, then the value of c will be

A
-4
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
4
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is A -4
Circle x2+y2+2gx+2fy+c=0 is concentric with x2+y22x+4y+20=0. Therefore centre is (1, -2) and radius
=g2+f2c=(14)2+(2+2)2c=4.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Definition and Standard Forms
MATHEMATICS
Watch in App
Join BYJU'S Learning Program
CrossIcon