Question

Let n∈N, and let a1,a2,...an∈R. Prove that |a1+a2+...+an|<or=|a1|+|a2|+...+|an|

Let n∈N, and let a1,a2,...an∈R. Prove that

|a1+a2+...+an|<or=|a1|+|a2|+...+|an|

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Answer #1

We will prove the given inequality by mathematical induction.

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