2010006003

SubArea: 
Conics
Level: 
C
Project ID: 
2010006003
Source Problem: 
1003024109
Accepted: 
0
Clonable: 
1
Easy: 
0
Find the set of values of the parameter c∈R for which the line 5x−3y−c=0 isn't a secant of the ellipse 25x2+16y2=400.
(−∞;−25]∪[25;∞)
(−25;25)
{−25,25}
(−∞;−25)∪(25;∞)
[25;∞)