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這一題高中數學如何解?
Sep 23rd 2013, 13:53

非零多項式f(x)可以寫成:

f(x) = a_n x^n + a_(n-1) x^(n-1) + ... + a_2 x² + a_1 x + a_0

各項係數和其實即是 f(1)。

留意 f(1) = a_n + a_(n-1) + ... + a_2 + a_1 + a_0

即現在 f(1) = 5。

題目求f(x)+3除以x−1的餘數。

設 g(x) = f(x) + 3,也為多項式。

g(x)除以x−1的餘數是 g(1)

g(1) = f(1) + 3 = 5 + 3 = 8

答案為 (D)

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賴清德條款 氣象局增「降雨警戒」
Sep 21st 2013, 12:04

民視 – 

8月底康芮颱風來襲,水淹南台灣,台南市長賴清德抱怨氣象局預報不準,沒有針對雨量做示警,這一回,氣象局打破以往,在暴風圈外,另外增設「降雨警戒」,這也被稱是「賴清德條款」,這次降雨警戒特別點名宜蘭縣,結果雨勢卻不明顯,氣象局遭質疑,預報失準。

不管是海邊、郊區、還是市區,宜蘭一整天,雨勢並不猛烈,不過,氣象局預報可不是這麼說的,氣象局颱風預報頭一遭,除了海上、陸上警戒區之外,又多了一個「降雨警戒」,就是衝著8月底康芮颱風,水淹台南市,台南市長賴清德抱怨雨量預報失準,又被稱為賴清德條款,沒想到,氣象局首度增加「降雨警戒」,就出師不利。

氣象氣否認預報失準,不過,糗的不只在宜蘭,台中前一天被列入陸上警戒區,21日上午11點45分才解除,台南也被列入陸上警戒區,但「這兩都」都無風也無雨,民眾擠進百貨公司、電影院、餐廳,樂得賺到一天颱風假。

氣象局原本想透過增列降雨警戒,扳回一城,但天兔颱風難以捉摸,預報數字和實際天候有落差,讓氣象局看來有些漏氣。

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【快訊】肯亞商場再傳激烈槍響
Sep 23rd 2013, 03:30

【綜合報導】已釀成至少68人死亡的肯亞西門購物中心,上午11時前後再次從建築內爆出猛烈槍聲,目前尚未獲悉槍戰詳情。
 

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