Circle And System Of Circles Question 311
Question: If the line $ x=k $ touches the circle $ x^{2}+y^{2}=9 $ , then the value of k is
Options:
A) 2 but not - 2
B) - 2 but not 2
C) 3
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
$ k=3, $ as perpendicular from centre on line = radius.