2010005903 | math4u.vsb.cz

SubArea:

Level:

Project ID:

2010005903

Source Problem:

Accepted:

0

Clonable:

1

Easy:

0

Find the values of the real parameter

r

which ensure that the line

x = r

is a tangent to the circle

x^{2} + y^{2} - 4 x + 10 y + 4 = 0.

{- 3; 7}

{- 7; 3}

{- 10; 0}

{0; 10}