Level:
Project ID:
9000123101
Source Problem:
Accepted:
1
Clonable:
1
Easy:
0
Find the values of the real parameter \(q\)
which ensure that the line \(y = q\)
is a tangent to the circle
\[
x^{2} + y^{2} + 4x - 8y + 4 = 0.
\]
\(\{0,8\}\)
\(\{ - 6,2\}\)
\(\{ - 8,0\}\)
\(\{ - 2,6\}\)