Hello Friends,
I am having a problem understanding that Example 7 pg no:8and9 in cirlces Study material..........How they used that family of lines for 3 and 4 lines............


And sir straight line upload karna bhool gaya kya????????? u r doing a really gr888 job sir and i am sure all the correspondence courses like brilliant narayana cp etc..etc.. are going to close up as soon as this site gets famous..your material is Far far better than theirs..
Thank u very mush...and plzz try to solve my query it uses a bit different concept not available in other books and it written that it has been explained in straight lines......plzz help and THANK U once again

See the best approach to understand is that we need a locus which passes through the intersection of the three lines.

so points satisfying L1L2 + tL2L3 + pL3L1=0

will definetly pass through intersection of lines then and only then the equation satisfies . Moreover the equation is of second degree there fore is a circle..............