finding the minimum

Jul 2010
2
0
hi, i wanted to know how do i get the minimum for \(\displaystyle \displaystyle f(x)=\sum_{i=1}^k\|x-a_i\|^2\) where \(\displaystyle f:\mathbb R^n\to\mathbb R\) and \(\displaystyle a_1,\ldots,a_k\in\mathbb R^n.\)