Show the following are true

Subject:MathPrice:3.85 Bought3

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Show the following are true. That is, use the rules of the summation operator and the definition of a sample mean to rearranging the left term into the right term. Σαι, = αη Β. Σ (x: - x) = 0 Α. Σας, = ο Β. Σαν - ) = 0 ο Σα-' - Σκι - Β' » Σας - Σχοι -9- Συν- Ε. Σας - Ιχνι-»- Σας - 39, . Σας - Ενοι - 5) - Σφι- 9