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專題14數列求和綜合必刷100題任務一:善良模式(基礎)1-30題一、單選題1.已知數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<02.已知數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,則數列SKIPIF1<0的前2020項的和為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.數列1,1+2,1+2+22,…,1+2+22+…+2n-1,…的前99項和為()A.2100-101 B.299-101 C.2100-99 D.299-994.已知數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0滿足SKIPIF1<0,記數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,SKIPIF1<0.則使得SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<05.已知數列{an}滿足:an+1=an-an-1(n≥2,n∈N*),a1=1,a2=2,Sn為數列{an}的前n項和,則S2021=()A.3 B.2 C.1 D.06.正項數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.化簡SKIPIF1<0的結果是()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<08.已知數列SKIPIF1<0中,SKIPIF1<0,求數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<09.等比數列SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0,數列SKIPIF1<0,SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,則SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.已知數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0滿足SKIPIF1<0,記數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,SKIPIF1<0.則使得SKIPIF1<0成立的SKIPIF1<0的最大值為()A.17 B.18 C.19 D.20第II卷(非選擇題)二、填空題11.數列SKIPIF1<0是首項和公差都為1的等差數列,其前n項和為SKIPIF1<0,若SKIPIF1<0是數列SKIPIF1<0的前n項和,則SKIPIF1<0______12.已知數列SKIPIF1<0的通項公式SKIPIF1<0,設其前SKIPIF1<0項和為SKIPIF1<0,則使SKIPIF1<0成立的最小的自然SKIPIF1<0為__________.13.已知數列SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0的前20項和SKIPIF1<0________.14.已知正項數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0___________.15.設數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則數列SKIPIF1<0的前50項和是________.16.設SKIPIF1<0,則SKIPIF1<0__________.17.數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,且SKIPIF1<0,且SKIPIF1<0,則SKIPIF1<0___________.18.在數列SKIPIF1<0中,SKIPIF1<0,且SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和為__________.19.已知數列SKIPIF1<0,……,則該數列的前10項和為__________.20.已知數列SKIPIF1<0滿足SKIPIF1<0且SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項為SKIPIF1<0,則不等式SKIPIF1<0最小整數解為________.三、解答題21.數列SKIPIF1<0的前n項和為SKIPIF1<0,若SKIPIF1<0,點SKIPIF1<0在直線SKIPIF1<0上.(1)求證:數列SKIPIF1<0是等差數列;(2)若數列SKIPIF1<0滿足SKIPIF1<0,求數列SKIPIF1<0的前n項和SKIPIF1<0.22.已知數列SKIPIF1<0為等差數列,公差SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0依次成等比數列.(1)求數列SKIPIF1<0的通項公式;(2)設SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,若SKIPIF1<0,求SKIPIF1<0的值.23.在等差數列SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0.(1)求數列SKIPIF1<0的通項公式;(2)令SKIPIF1<0,求數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0.24.已知數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0.(1)求證:數列SKIPIF1<0是等差數列,并求數列SKIPIF1<0的通項公式;(2)若,求數列SKIPIF1<0的前n項和SKIPIF1<0.在(①SKIPIF1<0;②SKIPIF1<0;③SKIPIF1<0三個條件中選擇一個補充在第(2)問中,并對其求解,如果多寫按第一個計分)25.已知正項數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0.數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0.(1)求數列SKIPIF1<0的通項公式;(2)證明:SKIPIF1<0.26.已知SKIPIF1<0是等比數列,SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0.(1)求數列SKIPIF1<0的通項公式;(2)設SKIPIF1<0,求數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0.27.已知公差不為0的等差數列SKIPIF1<0滿足SKIPIF1<0,且SKIPIF1<0成等比數列.(1)求數列SKIPIF1<0的通項公式;(2)設SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,證明SKIPIF1<0.28.已知數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0.數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,其中SKIPIF1<0為數列SKIPIF1<0是前n項和.(1)求數列SKIPIF1<0,SKIPIF1<0的通項公式;(2)令SKIPIF1<0,求數列SKIPIF1<0的前n項和SKIPIF1<0,并證明:SKIPIF1<0.29.已知數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,SKIPIF1<0,數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0.(1)求數列SKIPIF1<0、SKIPIF1<0的通項公式;(2)若數列SKIPIF1<0滿足SKIPIF1<0,求證:SKIPIF1<0.30.在各項均為正數的等比數列SKIPIF1<0中,SKIPIF1<0成等差數列.等差數列{SKIPIF1<0}滿足SKIPIF1<0,SKIPIF1<0.(1)求數列{SKIPIF1<0},{SKIPIF1<0}的通項公式;(2)設數列SKIPIF1<0的前n項和為Tn,證明:SKIPIF1<0任務二:中立模式(中檔)1-40題一、單選題1.已知數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0且SKIPIF1<0,則該數列的前9項之和為()A.32 B.43 C.34 D.352.數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,則()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<03.設SKIPIF1<0為數列SKIPIF1<0的前SKIPIF1<0項和,SKIPIF1<0,且SKIPIF1<0.記SKIPIF1<0為數列SKIPIF1<0的前SKIPIF1<0項和,若對任意SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0的最小值為()A.3 B.SKIPIF1<0 C.2 D.SKIPIF1<04.記數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<05.數列SKIPIF1<0是正項等比數列,滿足SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.數列SKIPIF1<0滿足SKIPIF1<0,且SKIPIF1<0(SKIPIF1<0),則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<07.設數列SKIPIF1<0滿足SKIPIF1<0,若SKIPIF1<0,且數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<08.已知函數SKIPIF1<0,數列SKIPIF1<0滿足SKIPIF1<0,則數列SKIPIF1<0的前2019項和為()A.SKIPIF1<0 B.1010 C.SKIPIF1<0 D.10119.已知數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,前SKIPIF1<0項積為SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0.若SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.數列SKIPIF1<0滿足SKIPIF1<0﹐若SKIPIF1<0,則SKIPIF1<0的前SKIPIF1<0項和為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<011.已知等差數列SKIPIF1<0的公差為2,前n項和為SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等比數列.令SKIPIF1<0,數列SKIPIF1<0的前n項和為SKIPIF1<0,若對于SKIPIF1<0,不等式SKIPIF1<0恒成立,則實數SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<012.已知數列SKIPIF1<0滿足SKIPIF1<0,設SKIPIF1<0,且SKIPIF1<0,則數列SKIPIF1<0的首項SKIPIF1<0的值為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<013.設SKIPIF1<0為數列SKIPIF1<0的前n項和,SKIPIF1<0,則SKIPIF1<0()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<014.正項數列SKIPIF1<0的前n項和為SKIPIF1<0,且SKIPIF1<0,設SKIPIF1<0,則數列SKIPIF1<0的前2020項的和為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<0第II卷(非選擇題)二、填空題15.已知正項數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,且SKIPIF1<0.若SKIPIF1<0,則數列SKIPIF1<0的前2021項和為___________.16.已知數列SKIPIF1<0的各項均為正數,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,若SKIPIF1<0對任意正整數SKIPIF1<0都成立,則SKIPIF1<0的取值范圍是___________.17.設SKIPIF1<0為數列SKIPIF1<0的前SKIPIF1<0項和,滿足SKIPIF1<0,SKIPIF1<0,其中SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,則SKIPIF1<0___________.18.已知正項數列SKIPIF1<0滿足SKIPIF1<0且SKIPIF1<0,令SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項的和等于___________.19.已知SKIPIF1<0,記數列SKIPIF1<0的前n項和為SKIPIF1<0,且對于任意的SKIPIF1<0,SKIPIF1<0,則實數t的最大值是________.20.數列SKIPIF1<0且SKIPIF1<0SKIPIF1<0,若SKIPIF1<0為數列SKIPIF1<0的前SKIPIF1<0項和,則SKIPIF1<0__________.21.用SKIPIF1<0表示正整數SKIPIF1<0所有因數中最大的那個奇數,例如:SKIPIF1<0的因數有SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0,SKIPIF1<0的因數有SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0.計算SKIPIF1<0________.22.已知數列SKIPIF1<0滿足SKIPIF1<0,則SKIPIF1<0___________;若SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0___________.23.已知數列SKIPIF1<0的前n項和為SKIPIF1<0,且滿足SKIPIF1<0,則SKIPIF1<0______________.24.已知數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,點SKIPIF1<0在直線SKIPIF1<0上.若SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,則滿足SKIPIF1<0的SKIPIF1<0的最大值為________.25.已知正項數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,設SKIPIF1<0,則數列SKIPIF1<0前SKIPIF1<0項和的取值范圍為_________.26.已知數列SKIPIF1<0滿足:SKIPIF1<0,SKIPIF1<0,SKIPIF1<0(SKIPIF1<0且SKIPIF1<0),等比數列SKIPIF1<0公比SKIPIF1<0,令SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0___________.27.已知數列SKIPIF1<0與SKIPIF1<0前n項和分別為SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,則SKIPIF1<0________.三、解答題28.數列SKIPIF1<0中,SKIPIF1<0為SKIPIF1<0的前SKIPIF1<0項和,SKIPIF1<0,SKIPIF1<0.(1)求數列SKIPIF1<0的通項公式;(2)若SKIPIF1<0,求數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0.29.已知各項均為正數的無窮數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0.(1)證明數列SKIPIF1<0是等差數列,并求出SKIPIF1<0的通項公式;(2)若數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0.設數列SKIPIF1<0滿足SKIPIF1<0,證明:SKIPIF1<0.30.已知等差數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,數列SKIPIF1<0是各項均為正數的等比數列,SKIPIF1<0,SKIPIF1<0.(1)求數列SKIPIF1<0的通項公式;(2)在①SKIPIF1<0,②SKIPIF1<0,③SKIPIF1<0,這三個條件中任選一個,補充在下面問題中,并作答.問題:已知SKIPIF1<0,___________,是否存在正整數SKIPIF1<0,使得數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0?若存在,求SKIPIF1<0的最小值;若不存在,說明理由.(注:如果選擇多個條件分別解答,按第一個解答計分.)31.在①SKIPIF1<0,SKIPIF1<0;②公差為2,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等比數列;③SKIPIF1<0;三個條件中任選一個,補充在下面問題中,并給出解答.問題:已知數列SKIPIF1<0為公差不為零的等差數列,其前項和為SKIPIF1<0,______.(1)求數列SKIPIF1<0的通項公式;(2)令SKIPIF1<0,其中SKIPIF1<0表示不超過x的最大整數,求SKIPIF1<0的值.注:如果選擇多個條件分別解答,按第一個解答計分.32.在①SKIPIF1<0②SKIPIF1<0這兩組條件中任選一組,補充在下面橫線處,并解答下列問題.已知數列的SKIPIF1<0前SKIPIF1<0項和是SKIPIF1<0數列SKIPIF1<0的前SKIPIF1<0項和是SKIPIF1<0,__________.(1)求數列SKIPIF1<0的通項公式;(2)設SKIPIF1<0證明:SKIPIF1<033.在①SKIPIF1<0;②SKIPIF1<0;③SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等差數列這三個條件中任選一個,補充在下面的問題中,并解答.問題:數列SKIPIF1<0是各項均為正數的等比數列,前n項和為SKIPIF1<0,SKIPIF1<0且______.(1)求數列SKIPIF1<0的通項公式;(2)SKIPIF1<0,求數列SKIPIF1<0的前n項和SKIPIF1<0.注:如果選擇多個條件分別解答,按第一個解答計分.34.已知數列SKIPIF1<0中,SKIPIF1<0,SKIPIF1<0.(1)求證:SKIPIF1<0是等比數列,并求SKIPIF1<0的通項公式;(2)數列SKIPIF1<0滿足SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,若不等式SKIPIF1<0對一切SKIPIF1<0恒成立,求SKIPIF1<0的取值范圍.35.已知SKIPIF1<0為等比數列,SKIPIF1<0,記數列SKIPIF1<0滿足SKIPIF1<0,且SKIPIF1<0.(1)求SKIPIF1<0和SKIPIF1<0的通項公式;(2)對任意的正整數SKIPIF1<0,設SKIPIF1<0,求SKIPIF1<0的前SKIPIF1<0項的和SKIPIF1<0.36.設正項數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,滿足SKIPIF1<0.(1)求數列SKIPIF1<0的通項公式;(2)令SKIPIF1<0,若數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,證明:SKIPIF1<0.37.已知數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0.若SKIPIF1<0,且SKIPIF1<0(1)求SKIPIF1<0;(2)設SKIPIF1<0,記數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0.證明:SKIPIF1<0.38.已知等差數列SKIPIF1<0的前n項和為SKIPIF1<0,且SKIPIF1<0.(1)求SKIPIF1<0的通項公式以及SKIPIF1<0;(2)求使不等式SKIPIF1<0成立的最小值n.39.設數列SKIPIF1<0前SKIPIF1<0項和為SKIPIF1<0,SKIPIF1<0,SKIPIF1<0(SKIPIF1<0).(1)求出SKIPIF1<0通項公式;(2)若SKIPIF1<0,求數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0.40.設數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,已知SKIPIF1<0.(1)求SKIPIF1<0通項公式;(2)對任意的正整數SKIPIF1<0,設SKIPIF1<0SKIPIF1<0,求數列SKIPIF1<0的前SKIPIF1<0項和.任務三:邪惡模式(困難)1-30題一、單選題1.已知數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0(SKIPIF1<0),則數列SKIPIF1<0的前2017項的和為()A.SKIPIF1<0 B.SKIPIF1<0C.SKIPIF1<0 D.SKIPIF1<02.已知數列SKIPIF1<0滿足SKIPIF1<0,其前SKIPIF1<0項和SKIPIF1<0,數列SKIPIF1<0滿足SKIPIF1<0,其前SKIPIF1<0項和為SKIPIF1<0,若SKIPIF1<0對任意SKIPIF1<0恒成立,則實數SKIPIF1<0的取值范圍是()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<03.已知等比數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,若SKIPIF1<0,SKIPIF1<0是數列SKIPIF1<0的前SKIPIF1<0項和,對任意SKIPIF1<0,不等式SKIPIF1<0恒成立,則實數SKIPIF1<0的取值范圍為()A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<04.設SKIPIF1<0為不超過x的最大整數,SKIPIF1<0為SKIPIF1<0可能取到所有值的個數,SKIPIF1<0是數列SKIPIF1<0前n項的和,則下列結論正確個數的有SKIPIF1<0SKIPIF1<0(1)SKIPIF1<0(2)SKIPIF1<0是數列SKIPIF1<0中的項(3)SKIPIF1<0(4)當SKIPIF1<0時,SKIPIF1<0取最小值A.1個 B.2個 C.3個 D.45.設數列SKIPIF1<0的前SKIPIF1<0項積SKIPIF1<0,記SKIPIF1<0,求SKIPIF1<0的取值范圍是().A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<06.已知SKIPIF1<0數列SKIPIF1<0的前SKIPIF1<0項和,SKIPIF1<0,且SKIPIF1<0,若SKIPIF1<0,(其中SKIPIF1<0),則SKIPIF1<0的最小值是()A.SKIPIF1<0 B.4 C.SKIPIF1<0 D.20187.數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0(SKIPIF1<0且SKIPIF1<0),數列SKIPIF1<0為遞增數列,數列SKIPIF1<0為遞減數列,且SKIPIF1<0,則SKIPIF1<0().A.SKIPIF1<0 B.SKIPIF1<0 C.4851 D.49508.已知數列SKIPIF1<0中,SKIPIF1<0,若SKIPIF1<0,設SKIPIF1<0,若SKIPIF1<0,則正整數SKIPIF1<0的最大值為()A.1009 B.1010 C.2019 D.20209.已知數列SKIPIF1<0滿足SKIPIF1<0…SKIPIF1<0,設數列SKIPIF1<0滿足:SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,若SKIPIF1<0恒成立,則SKIPIF1<0的取值范圍是A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<010.艾薩克·牛頓(1643年1月4日——1727年3月31日)英國皇家學會會長,英國著名物理學家,同時在數學上也有許多杰出貢獻,牛頓用“作切線”的方法求函數SKIPIF1<0零點時給出一個數列SKIPIF1<0:滿足SKIPIF1<0,我們把該數列稱為牛頓數列.如果函數SKIPIF1<0(SKIPIF1<0)有兩個零點SKIPIF1<0,SKIPIF1<0,數列SKIPIF1<0為牛頓數列,設SKIPIF1<0,已知SKIPIF1<0,SKIPIF1<0,SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,則SKIPIF1<0等于A.SKIPIF1<0 B.SKIPIF1<0 C.SKIPIF1<0 D.SKIPIF1<011.已知SKIPIF1<0是函數SKIPIF1<0SKIPIF1<0的極值點,數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0,記SKIPIF1<0,若SKIPIF1<0表示不超過SKIPIF1<0的最大整數,則SKIPIF1<0()A.2017 B.2018 C.2019 D.202012.設SKIPIF1<0表示不超過SKIPIF1<0的最大整數,已知數列SKIPIF1<0中,SKIPIF1<0,且SKIPIF1<0,若SKIPIF1<0,則整數SKIPIF1<0A.99 B.100 C.101 D.102第II卷(非選擇題)二、填空題13.已知數列SKIPIF1<0滿足:SKIPIF1<0,SKIPIF1<0,SKIPIF1<0(SKIPIF1<0且SKIPIF1<0),等比數列SKIPIF1<0公比SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0___________.14.各項均為正數的等比數列SKIPIF1<0,滿足SKIPIF1<0,且SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等差數列,數列SKIPIF1<0滿足SKIPIF1<0,數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0,則SKIPIF1<0______.15.已知公差不為零的等差數列SKIPIF1<0的前SKIPIF1<0項和為SKIPIF1<0,且滿足SKIPIF1<0,SKIPIF1<0,SKIPIF1<0成等比數列,SKIPIF1<0,數列SKIPIF1<0滿足SKIPIF1<0,前SKIPIF1<0項和為SKIPIF1<0,則SKIPIF1<0_________.16.已知SKIPIF1<0是等差數列SKIPIF1<0的前SKIPIF1<0項和,若SKIPIF1<0,設SKIPIF1<0,則數列SKIPIF1<0的前SKIPIF1<0項和SKIPIF1<0取最大值時SKIPIF1<0的值為______________17.已知數列SKIPIF1<0的前n項和為SKIPIF1<0,數列SKIPIF1<0的前n項和為SKIPIF1<0,滿足SKIPIF1<0,SKIPIF1<0,且SKIPIF1<0.若對SKIPIF1<0,SKIPIF1<0恒成立,則實數SKIPIF1<0的最小值為____________.18.已知函數SKIPIF1<0若對于正數SKIPIF1<0,直線SKIPIF1<0與函數SKIPIF1<0的圖象恰有SKIPIF1<0個不同的交點,則數列SKIPIF1<0的前n項和為________.19.數列SKIPIF1<0滿足SKIPIF1<0,SKIPIF1<0SKIPIF1<0,則SKIPIF1<0的整數部分是___________.20.設SKIPIF1<0表示正整數n的個位數字,記SKIPIF1<0,M是SKIPIF1<0的前4038項的和,函數SKIPIF1<0,若函數SKIPIF1<0滿足SKIPIF1<0,則數列SKIPIF1<0的前2020項的和為________.21.已知正項數列SKIPIF1<0滿足
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