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Posted: **Thu Jul 14, 2022 3:47 pm**

: Problem 30 Prove That X1 Xn 2 N X12 Xn2 For All Positive Integers N And All Real Numbers X1 Xn 10 Marks 1 (11.67 KiB) Viewed 42 times

Problem 30. Prove that (x1+⋯+xn)2≤n(x12+⋯+xn2) for all positive integers n and all real numbers x1,⋯,xn. [10 marks] [Total: 40 marks]

Problem 30. Prove that (x1​+⋯+xn​)2≤n(x12​+⋯+xn2​) for all positive integers n and all real numbers x1​,⋯,xn​. [10 marks