Level:
Project ID:
2010012202
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
Find all the values of the real parameter \( a \) such that \( f(x)=ax^2+2 \) is increasing on \( (0,\infty) \).
\( a\in(0,+\infty) \)
\( a\in(-\infty,0) \)
\( a\in [ 2,+\infty) \)
\( a\in(-\infty,2 ] \)