Circle And System Of Circles Question 239
Question: Two circles $ S_1=x^{2}+y^{2}+2g_1x+2f_1y+c_1=0 $ and $ S_2=x^{2}+y^{2}+2g_2x+2f_2y+c_2=0 $ cut each other orthogonally, then
[RPET 1995]
Options:
A) $ 2g_1g_2+2f_1f_2=c_1+c_2 $
B) $ 2g_1g_2-2f_1f_2=c_1+c_2 $
C) $ 2g_1g_2+2f_1f_2=c_1-c_2 $
D) $ 2g_1g_2-2f_1f_2=c_1-c_2 $
Show Answer
Answer:
Correct Answer: A
Solution:
It is a fundamental concept.
BETA
