Question

A number sequence a1, a2, a3, ... is such that
$a1 = 0 \\ |a2| = |a1 + 1| \\ |a3| = |a2 + 1|$
and so on
Prove that the arithmetic means of a1, a2, a3, ... ,an is not less than (-1/2)​

Answer 1

Step-by-step explanation:

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