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

The line lx+my+n=0 is normal to the circle x2+y2+2gx+2fy+c=0, if

A
lg+mf+n=0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
lg+mfn=0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
lgmfn=0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
lgmf+n=0
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B lg+mfn=0
Given circle is
x2+y2+2gx+2fy+c=0
Centre, C=(g,f)
Line lx+my+n=0 is normal to the given circle, so it passes through the centre,
lgmf+n=0
lg+mfn=0

flag
Suggest Corrections
thumbs-up
2
Join BYJU'S Learning Program
Join BYJU'S Learning Program
CrossIcon