1003020401

SubArea: 
Conics
Level: 
A
Project ID: 
1003020401
Source Problem: 
2010006301
Accepted: 
1
Clonable: 
1
Easy: 
0
The equation of an ellipse is given by \( 5x^2+9y^2-30x-18y+9=0 \). The length of its semi-major axis is:
\( 3 \)
\( 5 \)
\( 9 \)
\( \sqrt5 \)
\( 14 \)