Here's the question you clicked on:
Azteck
If \[x_{1}, x_{2},...,x_{n}\] are given numbers, show that \[(x_{1}-x)^{2} +(x_{2}-x)^{2}+...+(x_{n}-x)^{2}\] is least when x is the arithmetic mean of \[x_{1}, x_{2},..., x_{n}.
\[x_{1}, x_{2},..., x_{n}\]
Let S be the summation \[S = (x _{1} - x)^{2} + (x _{2} - x)^{2} + . . . + (x _{n} - x)^{2}\] Find the derivative of S
Remember that the only variable here is x, all the x's with subscripts are constants.
Yep. I'm just getting the sum of that AP
Yeah this one was easier than the question before. Thanks.