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20xx屆廣東省汕頭市高三畢業(yè)班教學(xué)質(zhì)量監(jiān)測(cè)文科數(shù)學(xué)試題及答案(存儲(chǔ)版)

  

【正文】 ??3 求三棱錐 CF??? 的體積. 5 (本小題滿(mǎn)分 14 分) 設(shè)函數(shù) ? ? 3213g x x ax??的圖象在 1x? 處的切線(xiàn)平行于直線(xiàn) 20xy??.記 ??gx的導(dǎo)函數(shù)為 ??fx. ??1 求函數(shù) ??fx的解析式 ; ??2 記正項(xiàng)數(shù)列 ??na 的前 n 項(xiàng)和為 nS ,且 n ???? , ? ?12nnS f a? ,求 na ; ??3 對(duì)于數(shù)列 ??nb 滿(mǎn)足: 1 12b? , ? ?1nnb f b? ? ,當(dāng) 2n? , n ??? 時(shí),求證: 121 1 1121 1 1nb b b? ? ? ???? ?? ? ?. 2(本小題滿(mǎn)分 14 分) 已知函數(shù) ? ? ? ? 12 ln 2f x a x a xx? ? ? ?( 0a? ). ??1 當(dāng) 0a? 時(shí),求 ??fx的極值; ??2 當(dāng) 0a? 時(shí),討論 ??fx的單調(diào)性; ??3 若 ? ?3, 2a? ? ? ? , 1x , ? ?2 1,3x ? ,有 ? ? ? ? ? ?12ln 3 2 ln 3m a f x f x? ? ? ?,求實(shí)數(shù) m 的取值范圍. 6 汕頭市 2021 屆 高三教學(xué)質(zhì)量監(jiān)控測(cè)評(píng) 文科數(shù)學(xué)參考答案 一、 選擇題: 本大題共 10 小題,每小題 5 分,共 50 分 . 在每小題的 4個(gè)選項(xiàng)中 ,只有一項(xiàng)是符合題目要求的 . 題次 1 2 3 4 5 6 7 8 9 10 答案 B B C B A D C B C A 二、填空題:本大題共 5 小題 , 考生作答4小題, 每小題 5分 ,共 20 分 . 11. 24 12. 3 13. 8 14. 225 15. 34 三、解答題:本大題共 6小題 ,共 80 分 .解答應(yīng)寫(xiě)出文字說(shuō)明、證明過(guò)程或演算步驟 . :【答案】解 :(1)設(shè)等差數(shù)列??na的公差為 知 ??? ?????? 1232 3111 dada da …… 2分 (每式 1分) 解得 , 2,11 ?? da …… 4 分 (每式 1分) ∴ 12 ?? nan ( nN??) …… 6分 (2)由題意知 , nan nb 21 22 ?? ? ( nN??), …… 7 分 nnT 2642 2222 ????? ? 7 41 )41(4 ??? n …… 10分 )14(34 ?? n …… 12分 (1)當(dāng) x=6 時(shí) ,由莖葉圖可知 ,乙組同學(xué)去圖書(shū)館學(xué)習(xí)次數(shù)是 :6,7,8,11, …… 1 分 所以平均數(shù)為 84 11876_ ?????x… … 2 分 方差為 27])811()88()87()86[(41 22222 ?????????s …… 5 分 (列式 2 分,答案 1分) (2)甲組 中 學(xué)習(xí)次數(shù)大于 7 的同學(xué)有 3 名 , 記為 A1,A2,A3,他們?nèi)D書(shū)館學(xué)習(xí)次數(shù) 依次為 9,11,12。UE9aQGn8xp$Ramp。ksv*3tnGK8!z89Am YWpazadNuKNamp。ksv*3tnGK8!z89Am UE9aQGn8xp$Ramp。ksv*3t nGK8! z89Am YWpazadNuKNamp。ksv*3t nGK8! z8vGtYM *J gamp。M uWFA5uxY7J nD6YWRrWwc^vR9CpbK! zn%M z849Gx^G89Am UE9aQGn8xp$Ramp。ksv*3t nGK8! z89Am YWpazadNuKNamp。ksv*3t nGK8! z8vGt YM *Jgamp。M uWFA5uxY7J nD6YWRrWwc^vR9CpbK!zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。M uWFA5uxY7JnD6YWRr Wwc^vR9CpbK!zn%M z849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7J nD6YWRrWwc^vR9CpbK! zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。MuWFA5uxY7J nD6YWRrWwc^vR9CpbK! zn%Mz849Gx^Gjqv^$UE9wEwZQcUE%amp。M uWFA5uxY7J nD6YWRr Wwc^vR9CpbK! zn%M z849Gx^Gjqv^$UE9wEwZQcUE%amp。M uWFA5uxY7J nD6YWRr Wwc^vR9CpbK! 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