Level:
Project ID:
2010010907
Source Problem:
Accepted:
0
Clonable:
1
Easy:
0
How many of these functions do have a global maximum on the interval \( (-\infty;-1]\) at the point \(x=-1\)?
\[f(x)=x+\frac1x+2\]
\[g(x)=-x^2+6x-9\]
\[h(x)=2x-3\]
\(3\)
\(1\)
\(2\)
\(0\)