Level:
Project ID:
2010006001
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
Find the value of the parameter \( r\in\mathbb{R} \) for which the line \( 2x-y-1=0 \) is a tangent of the hyperbola \( 2x^2-y^2=r \).
\( 1 \)
\( -1 \)
\( 2 \)
\( -3 \)
\( 3 \)