circles
figured out the circles part . stuck on the inequality
|r1-r2| < C1C2 < |r1 +r2|
4 Replies
@Apu
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.since lambda is real and root is involved i am not sure where i can square where i can not
yo i got one approach but it may be wrong so can someone confirm
we take x^2+y^2=4 and put it in C'
13-4ux=0 (im taking lambda=u)
x=13/(4u) this means whenever they will intersect x will remain constant for both points of intersection
we take x and put it in C and get y=+-sqrt((64u^2-169))/(4u) now we need y to have 2 distinct values in that also both will have same magnitude but opposite sign so we just do the D>0 for 64u^2-169 by that im getting D option
am i missing something and got the answer by coincidence or is this method correct
@hardcoreisdead