9000070404

SubArea: 
Function Behavior
Level: 
A
Project ID: 
9000070404
Accepted: 
1
Clonable: 
0
Easy: 
1
Given function \(f(x)= -x^{2} + 4x + 12\), find the intervals where \(f\) is a decreasing function.
\(\left (2,\infty \right )\)
\(\left (1,\infty \right )\)
\(\left (-4,\infty \right )\)
\(\left (-6,\infty \right )\)