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anonymous
 3 years ago
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}.
anonymous
 3 years ago
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}.

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anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0\[x_{1}, x_{2},..., x_{n}\]

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Let S be the summation \[S = (x _{1}  x)^{2} + (x _{2}  x)^{2} + . . . + (x _{n}  x)^{2}\] Find the derivative of S

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Remember that the only variable here is x, all the x's with subscripts are constants.

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Yep. I'm just getting the sum of that AP

anonymous
 3 years ago
Best ResponseYou've already chosen the best response.0Yeah this one was easier than the question before. Thanks.
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