A communications syatem consists of n components,each of which will , independently,function with probability P.The total system will be able to operate effectively if at least one-half of it's components function (a)For what value of p is a 5-componant system more likely to operate effectively than a 3-component system ? (b)In general, when is a 2k+1 component system better than 2k-1 component system ? -- ◎ ◢) ○ 伴随着五彩光圈，蝴蝶所到之处，恶鬼全成了碎块， ◥◣◤ ○ ⊙◢◥█)) 蝴蝶优雅飞去，碎块才来得及落下。 ○ ◥) ◥) ◎ ◢█ --

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