[1HK]Prerequisites:[2BH]βΊβ».In the case \(n=1\), suppose \(A\) is an open interval, show that if \(π(x)=a\) and \( f'(x) π'(x){\lt} 0\) then the point \(x\) is a local minimum point for \(f\) bound to \(F_ a\).