Minus one times one half = minus one plus one half, and what you find is this rule

1 / [- n × (n + 1)] = - 1 / N + 1 / (n + 1) n is a positive integer

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7. Representation of set {2,4,6,8} by description Little brother, just on the road, not many points So {x | x = 2,4,6,8} right? Which is right? I feel right
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