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數(shù)列考點(diǎn)4年考題考情分析數(shù)列2023年新高考Ⅰ卷第7題2023年新高考Ⅱ卷第8題2021年新高考Ⅰ卷第16題2020年新高考Ⅰ卷第14題2020年新高考Ⅱ卷第15題數(shù)列會(huì)以單選題、多選題、填空題、解答題4類題型進(jìn)行考查,單選題難度一般或較難,縱觀近幾年的新高考試題,分別考查數(shù)列的性質(zhì)及推理、數(shù)列推理歸納與數(shù)列求和,備考時(shí)需強(qiáng)化對(duì)數(shù)列通項(xiàng)公式和求和公式的應(yīng)用,本內(nèi)容高考沖刺復(fù)習(xí)的重點(diǎn)復(fù)習(xí)內(nèi)容??梢灶A(yù)測(cè)2024年新高考命題方向?qū)⒗^續(xù)以數(shù)列通項(xiàng)、數(shù)列性質(zhì)及求和等知識(shí)點(diǎn)命題.1.(2023·新高考Ⅰ卷高考真題第7題)記SKIPIF1<0為數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和,設(shè)甲:SKIPIF1<0為等差數(shù)列;乙:SKIPIF1<0為等差數(shù)列,則(
)A.甲是乙的充分條件但不是必要條件B.甲是乙的必要條件但不是充分條件C.甲是乙的充要條件D.甲既不是乙的充分條件也不是乙的必要條件2.(2023·新高考Ⅱ卷高考真題第8題)記SKIPIF1<0為等比數(shù)列SKIPIF1<0的前n項(xiàng)和,若SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(
).A.120 B.85 C.SKIPIF1<0 D.SKIPIF1<03.(2021·新高考Ⅰ卷高考真題第16題)某校學(xué)生在研究民間剪紙藝術(shù)時(shí),發(fā)現(xiàn)剪紙時(shí)經(jīng)常會(huì)沿紙的某條對(duì)稱軸把紙對(duì)折,規(guī)格為SKIPIF1<0的長(zhǎng)方形紙,對(duì)折1次共可以得到SKIPIF1<0,SKIPIF1<0兩種規(guī)格的圖形,它們的面積之和SKIPIF1<0,對(duì)折2次共可以得到SKIPIF1<0,SKIPIF1<0,SKIPIF1<0三種規(guī)格的圖形,它們的面積之和SKIPIF1<0,以此類推,則對(duì)折4次共可以得到不同規(guī)格圖形的種數(shù)為_(kāi)_____;如果對(duì)折SKIPIF1<0次,那么SKIPIF1<0______SKIPIF1<0.等差數(shù)列通項(xiàng)公式:SKIPIF1<0SKIPIF1<0或SKIPIF1<0SKIPIF1<0等差中項(xiàng):若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0三個(gè)數(shù)成等差數(shù)列,則SKIPIF1<0,其中SKIPIF1<0叫做SKIPIF1<0,SKIPIF1<0的等差中項(xiàng)若SKIPIF1<0,SKIPIF1<0為等差數(shù)列,則SKIPIF1<0,SKIPIF1<0仍為等差數(shù)列等差數(shù)列前n項(xiàng)和公式:SKIPIF1<0或SKIPIF1<0等差數(shù)列的前SKIPIF1<0項(xiàng)和中,SKIPIF1<0,(SKIPIF1<0為奇數(shù))等比數(shù)列通項(xiàng)公式:SKIPIF1<0等比中項(xiàng):若SKIPIF1<0,SKIPIF1<0,SKIPIF1<0三個(gè)數(shù)成等比數(shù)列,則SKIPIF1<0,其中SKIPIF1<0叫做SKIPIF1<0,SKIPIF1<0的等比中項(xiàng)若SKIPIF1<0,SKIPIF1<0為等比數(shù)列,則SKIPIF1<0,SKIPIF1<0仍為等比數(shù)列等比數(shù)列前SKIPIF1<0項(xiàng)和公式:SKIPIF1<0已知SKIPIF1<0與SKIPIF1<0的關(guān)系SKIPIF1<0分組求和若SKIPIF1<0為等差數(shù)列,SKIPIF1<0為等比數(shù)列,則SKIPIF1<0可用分組求和裂項(xiàng)相消求和SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<0SKIPIF1<01.(2024·江蘇·一模)等比數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,已知SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.(2024·江蘇鹽城·模擬預(yù)測(cè))在等差數(shù)列SKIPIF1<0中,已知SKIPIF1<0則SKIPIF1<0的值為(
)A.3 B.4 C.5 D.63.(2024·湖南·二模)已知SKIPIF1<0是等比數(shù)列,SKIPIF1<0是其前SKIPIF1<0項(xiàng)和.若SKIPIF1<0,則SKIPIF1<0的值為(
)A.2 B.4 C.SKIPIF1<0 D.SKIPIF1<04.(2024·廣東江門·一模)已知SKIPIF1<0是等比數(shù)列,SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0是方程SKIPIF1<0兩根,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.(2024·廣東佛山·二模)設(shè)數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)之積為SKIPIF1<0,滿足SKIPIF1<0(SKIPIF1<0),則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.(2024·湖北·二模)已知公差為負(fù)數(shù)的等差數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,若SKIPIF1<0是等比數(shù)列,則當(dāng)SKIPIF1<0取最大值時(shí),SKIPIF1<0(
)A.2或3 B.2 C.3 D.47.(2024·福建漳州·模擬預(yù)測(cè))已知等差數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,等比數(shù)列SKIPIF1<0的公比與SKIPIF1<0的公差均為2,且滿足SKIPIF1<0,SKIPIF1<0,則使得SKIPIF1<0成立的SKIPIF1<0的最大值為(
)A.6 B.7 C.8 D.98.(2024·福建廈門·二模)已知正項(xiàng)等差數(shù)列SKIPIF1<0的公差為SKIPIF1<0,前SKIPIF1<0項(xiàng)和為SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0(
)A.1 B.2 C.3 D.49.(2024·福建漳州·一模)已知各項(xiàng)均不為0的數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.(2024·浙江溫州·二模)已知等差數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,公差為SKIPIF1<0,且SKIPIF1<0單調(diào)遞增.若SKIPIF1<0,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<011.(2024·浙江·模擬預(yù)測(cè))已知數(shù)列SKIPIF1<0滿足:SKIPIF1<0,且數(shù)列SKIPIF1<0為等差數(shù)列,則SKIPIF1<0(
)A.10 B.40 C.100 D.10312.(2024·河北邯鄲·三模)已知等比數(shù)列SKIPIF1<0的各項(xiàng)互不相等,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等差數(shù)列,則SKIPIF1<0(
)A.1 B.2 C.3 D.413.(2024·浙江金華·模擬預(yù)測(cè))已知公差不為0的等差數(shù)列SKIPIF1<0滿足SKIPIF1<0成等差數(shù)列,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<014.(2024·浙江·二模)在SKIPIF1<0中,“A,B,C成等差數(shù)列且SKIPIF1<0成等比數(shù)列”是“SKIPIF1<0是正三角形”的(
)A.充分不必要條件 B.必要不充分條件C.充要條件 D.既不充分也不必要條件15.(2024·江蘇·一模)已知正項(xiàng)數(shù)列SKIPIF1<0滿足SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0(
)A.SKIPIF1<0 B.1 C.SKIPIF1<0 D.216.(2024·江蘇徐州·一模)已知數(shù)列SKIPIF1<0的前n項(xiàng)和為SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0.若SKIPIF1<0,則正整數(shù)k的最小值為(
)A.11 B.12 C.13 D.1417.(2024·安徽池州·二模)對(duì)于數(shù)列SKIPIF1<0,若點(diǎn)SKIPIF1<0都在函數(shù)SKIPIF1<0的圖象上,其中SKIPIF1<0且SKIPIF1<0,則“SKIPIF1<0”是“SKIPIF1<0為遞增數(shù)列”的(
)A.充要條件 B.充分不必要條件C.必要不充分條件 D.既不充分也不必要條件18.(2024·全國(guó)·模擬預(yù)測(cè))已知等差數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和SKIPIF1<0,若SKIPIF1<0,數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,且SKIPIF1<0,則正整數(shù)SKIPIF1<0的值為(
)A.12 B.10 C.9 D.819.(2024·湖南·二模)張揚(yáng)的父親經(jīng)營(yíng)著一家童鞋店,該店提供從25碼到36.5碼的童鞋,尺寸之間按0.5碼為公差排列成等差數(shù)列.有一天,張揚(yáng)幫助他的父親整理某一型號(hào)的童鞋,以便確定哪些尺寸需要進(jìn)貨,張揚(yáng)在進(jìn)貨單上標(biāo)記了兩個(gè)缺貨尺寸.幾天后,張揚(yáng)的父親詢問(wèn)那些缺貨尺寸是哪些,但張揚(yáng)無(wú)法找到標(biāo)記缺貨尺寸的進(jìn)貨單,他只記得其中一個(gè)尺寸是28.5碼,并且在當(dāng)時(shí)將所有有貨尺寸加起來(lái)的總和是677碼.現(xiàn)在問(wèn)題是,另外一個(gè)缺貨尺寸是(
)A.28碼 B.29.5碼 C.32.5碼 D.34碼20.(2024·湖北武漢·模擬預(yù)測(cè))法布里-貝羅研究多光束干涉在薄膜理論中的應(yīng)用時(shí),用光波依次透過(guò)SKIPIF1<0層薄膜,記光波的初始功率為SKIPIF1<0,記SKIPIF1<0為光波經(jīng)過(guò)第SKIPIF1<0層薄膜后的功率,假設(shè)在經(jīng)過(guò)第SKIPIF1<0層薄膜時(shí)光波的透過(guò)率SKIPIF1<0,其中SKIPIF1<0,2,3…SKIPIF1<0,為使得SKIPIF1<0,則SKIPIF1<0的最大值為(
)A.31 B.32 C.63 D.6421.(2024·河北滄州·一模)已知等比數(shù)列SKIPIF1<0的前SKIPIF1<0項(xiàng)和為SKIPIF1<0,則數(shù)列SKIPIF1<0的公比SKIPIF1<0滿足(
)A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<022.(2024·山東濰坊·一模)已知數(shù)列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0.若數(shù)列SKIPIF1<0是公比為2的等比數(shù)列,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<023.(2024·山東聊城·一模)已知數(shù)列SKIPIF1<0滿足SKIPIF1<0,則“SKIPIF1<0”是“SKIPIF1<0是等比數(shù)列”的(
)A.充分不必要條件 B.必要不充分條件C.充要條件 D.既不充分也不必要條件24.(2024·黑龍江齊齊哈爾·二模)數(shù)列SKIPIF1<0滿足SKIPIF1<0,若SKIPIF1<0,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<025.(2024·浙江·一模)一個(gè)正方形網(wǎng)格SKIPIF1<0由99條豎線和99條橫線組成,每個(gè)最小正方形格子邊長(zhǎng)都是1.現(xiàn)在網(wǎng)格中心點(diǎn)SKIPIF1<0處放置一棋子,棋子將按如下規(guī)則沿線移動(dòng):SKIPIF1<0.,點(diǎn)SKIPIF1<0到SKIPIF1<0的長(zhǎng)度為1,點(diǎn)SKIPIF1<0到SKIPIF1<0的長(zhǎng)度為2,點(diǎn)SKIPIF1<0到SKIPIF1<0的長(zhǎng)度為3,點(diǎn)SKIPIF1<0到SKIPIF1<0的長(zhǎng)度為4,……,每次換方向后的直線移動(dòng)長(zhǎng)度均比前一次多1,變換方向均為向右轉(zhuǎn).按此規(guī)則一直移動(dòng)直到移出網(wǎng)格SKIPIF1<0為止,則棋子在網(wǎng)格上移動(dòng)的軌跡長(zhǎng)度是(
)A.4752 B.4753 C.4850 D.485126.(2024·浙江·模擬預(yù)測(cè))已知數(shù)列SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<027.(2024·全國(guó)·模擬預(yù)測(cè))已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,數(shù)列SKIPIF1<0與數(shù)列SKIPIF1<0的公共項(xiàng)按從大到小的順序排列組成一個(gè)新數(shù)列SKIPIF1<0,則數(shù)列SKIPIF1<0的前99項(xiàng)和為(
)A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0
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