You are given the n numbers a1, a2, a3, , an. For a variable x, consider the expression
Chapter 4, Problem 43(choose chapter or problem)
You are given the n numbers a1, a2, a3, , an. For a variable x, consider the expression D = (xa1) 2+(xa2) 2+(xa3) 2++(xan) 2 . Show that D is a minimum when x is the average of a1, a2, a3, , an.
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