If the line x = k touches the circle x 2 + y 2 = 9 , then the value of k is

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Question: Answered & Verified by Expert

If the line $x=k$ touches the circle $x^2+y^2=9$, then the value of $k$ is

MathematicsCircleJEE Main

Options:

A $2$ but not $-2$
B $-2$ but not $2$
C $3$
D None of these

Solution:

1648 Upvotes Verified Answer

The correct answer is: $3$

$k=3$, as perpendicular from centre on line $=$ radius.

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