已知等差數(shù)列{}中共有18項(xiàng),其中奇數(shù)項(xiàng)之和為11,偶數(shù)項(xiàng)之和為29,則其公差為(      )

A、4                     B、3                     C、2                     D、1

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科目:高中數(shù)學(xué) 來(lái)源: 題型:

6、根據(jù)臺(tái)灣壽險(xiǎn)業(yè)的資料,男性從0歲、1歲、…到60歲各年齡層的死亡率
(單位:%)依序?yàn)?BR>1.0250,0.2350,0.1520,0.1010,0.0720,0.0590,0.0550,0.0540,0.0540,0.0520,
0.0490,0.0470,0.0490,0.0560,0.0759,0.1029,0.1394,0.1890,0.2034,0.2123,
0.2164,0.2166,0.2137,0.2085,0.2019,0.1948,0.1882,0.1830,0.1799,0.1793,
0.1813,0.1862,0.1941,0.2051,0.2190,0.2354,0.2539,0.2742,0.2961,0.3202,
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經(jīng)初步整理后,已知61個(gè)資料中共有24個(gè)資料小于0.2.請(qǐng)問(wèn)死亡率資料的中位數(shù)為下列哪一個(gè)選項(xiàng)?
(1)0.2034   (2)0.2164   (3)0.2137   (4)0.2085   (5)0.2019.

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科目:高中數(shù)學(xué) 來(lái)源:2010-2011年江西省寧岡中學(xué)高一第二學(xué)期期中考試數(shù)學(xué) 題型:單選題

已知等差數(shù)列{}中共有18項(xiàng),其中奇數(shù)項(xiàng)之和為11,偶數(shù)項(xiàng)之和為29,則其公差為(     )

A.4B.3C.2D.1

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科目:高中數(shù)學(xué) 來(lái)源:2010-2011年江西省高一第二學(xué)期期中考試數(shù)學(xué) 題型:選擇題

已知等差數(shù)列{}中共有18項(xiàng),其中奇數(shù)項(xiàng)之和為11,偶數(shù)項(xiàng)之和為29,則其公差為(      )

A、4            B、3            C、2            D、1

 

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科目:高中數(shù)學(xué) 來(lái)源: 題型:

已知等差數(shù)列{}中共有18項(xiàng),其中奇數(shù)項(xiàng)之和為11,偶數(shù)項(xiàng)之和為29,則其公差為(      )

A、4                     B、3                     C、2                     D、1

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