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高中数学必修一精品讲义(精讲+精练)
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这是一份高中数学必修一精品讲义(精讲+精练),文件包含32函数的性质精练原卷版docx、31函数的概念及表示精讲原卷版docx、23二次函数与一元二次方程不等式精炼原卷版docx、44对数函数精讲原卷版docx、23二次函数与一元二次方程不等式精讲原卷版docx、42指数函数精练原卷版docx、42指数函数精讲原卷版docx、54三角函数的图象与性质精讲原卷版docx、32函数的性质精讲原卷版docx、44对数函数精练原卷版docx、55三角恒等变换精讲原卷版docx、54三角函数的图象与性质精练原卷版docx、第五章三角函数章末测试原卷版docx、45函数的应用二精练原卷版docx、52三角函数的概念精讲原卷版docx、57三角函数的应用精练原卷版docx、15全称量词与存在量词精炼原卷版docx、52三角函数的概念精练原卷版docx、31函数的概念及表示精练原卷版docx、51任意角和弧度制精练原卷版docx、51任意角和弧度制精讲原卷版docx、53诱导公式精练原卷版docx、11集合概念及特征精讲原卷版docx、53诱导公式精讲原卷版docx、43对数运算精讲原卷版docx、56函数yAsinwx+φ精讲原卷版docx、22基本不等式精讲原卷版docx、41指数的运算精讲原卷版docx、13集合的基本运算精炼原卷版docx、45函数的应用二精讲原卷版docx、21等式与不等式的性质精讲原卷版docx、第一章集合与常用逻辑用语章末测试原卷版docx、15全称量词与存在量词精讲原卷版docx、33幂函数精讲原卷版docx、41指数的运算精练原卷版docx、11集合概念及特征精炼原卷版docx、22基本不等式精炼原卷版docx、13集合的基本运算精讲原卷版docx、第四章指数函数与对数函数章末测试原卷版docx、第二章一元二次函数方程和不等式章末测试原卷版docx、第三章函数概念与性质章末测试原卷版docx、14充分必要条件精炼原卷版docx、43对数运算精练原卷版docx、14充分必要条件精讲原卷版docx、57三角函数的应用精讲原卷版docx、34函数的应用一精讲原卷版docx、56函数yAsinwx+φ精练原卷版docx、33幂函数精练原卷版docx、12集合间的关系精讲原卷版docx、12集合间的关系精炼原卷版docx、55三角恒等变换精练原卷版docx、34函数的应用一精练原卷版docx、21等式与不等式的性质精炼原卷版docx、32函数的性质精练解析版docx、42指数函数精练解析版docx、31函数的概念及表示精讲解析版docx、54三角函数的图象与性质精讲解析版docx、23二次函数与一元二次方程不等式精炼解析版docx、32函数的性质精讲解析版docx、第五章三角函数章末测试解析版docx、44对数函数精练解析版docx、44对数函数精讲解析版docx、42指数函数精讲解析版docx、55三角恒等变换精讲解析版docx、第三章函数概念与性质章末测试解析版docx、54三角函数的图象与性质精练解析版docx、52三角函数的概念精讲解析版docx、31函数的概念及表示精练解析版docx、52三角函数的概念精练解析版docx、22基本不等式精讲解析版docx、51任意角和弧度制精练解析版docx、45函数的应用二精练解析版docx、45函数的应用二精讲解析版docx、第二章一元二次函数方程和不等式章末测试解析版docx、23二次函数与一元二次方程不等式精讲解析版docx、15全称量词与存在量词精炼解析版docx、22基本不等式精炼解析版docx、55三角恒等变换精练解析版docx、57三角函数的应用精练解析版docx、56函数yAsinwx+φ精讲解析版docx、51任意角和弧度制精讲解析版docx、43对数运算精讲解析版docx、11集合概念及特征精讲解析版docx、13集合的基本运算精炼解析版docx、第一章集合与常用逻辑用语章末测试解析版docx、56函数yAsinwx+φ精练解析版docx、第四章指数函数与对数函数章末测试解析版docx、53诱导公式精练解析版docx、15全称量词与存在量词精讲解析版docx、14充分必要条件精炼解析版docx、12集合间的关系精炼解析版docx、21等式与不等式的性质精讲解析版docx、13集合的基本运算精讲解析版docx、11集合概念及特征精炼解析版docx、53诱导公式精讲解析版docx、41指数的运算精讲解析版docx、33幂函数精讲解析版docx、43对数运算精练解析版docx、33幂函数精练解析版docx、14充分必要条件精讲解析版docx、12集合间的关系精讲解析版docx、41指数的运算精练解析版docx、57三角函数的应用精讲解析版docx、34函数的应用一精讲解析版docx、34函数的应用一精练解析版docx、21等式与不等式的性质精炼解析版docx等106份试卷配套教学资源,其中试卷共1176页, 欢迎下载使用。
4.5 函数的应用(二)【题组一 零点的求解】1.若函数的两个零点是2和3,则函数的零点是A.和 B.和C.和 D.和【答案】B 【解析】函数的两个零点是2和3, 由函数的零点与方程根的关系知方程的两根为2和3.结合根与系数的关系得,即,∴,∴g(x)的零点为和,故选B.2.(2020·北京高一期中)已知函数,那么方程f(x)=0的解是( )A. B.x=1 C.x=e D.x=1或x=e【答案】C【解析】依题意,所以.故选:C3.(2020年广东湛江)若函数的两个零点是2和3,则函数的零点是A.和 B.和C.和 D.和【答案】B 【解析】函数的两个零点是2和3, 由函数的零点与方程根的关系知方程的两根为2和3.结合根与系数的关系得,即,∴,∴g(x)的零点为和,故选B.【题组二 零点区间的判断】1.(2020·浙江高一课时练习)在下列区间中,函数的零点所在的区间为( )A. B. C. D.【答案】C【解析】因为函数在上连续单调递增,且,所以函数的零点在区间内,故选C.2.(2020·浙江高一课时练习)设函数与的图象的交点为,则所在的区间是( )A. B.C. D.【答案】B【解析】因为根据题意可知,当x=1时,则,而当x=2时,则,故选B.3.(2020天津高一期中)在下列个区间中,存在着函数的零点的区间是( )A. B. C. D.【答案】C【解析】由.由零点存在定理知函数在上必有零点。故选C.4.(2020年广东潮州)函数f(x)=ln(2x)-1的零点位于区间( )A.(2,3) B.(3,4)C.(0,1) D.(1,2)【答案】D【解析】由题意,函数,可得函数为单调递增函数,且是连续函数又由f(1)=ln 2-1<0,f(2)=ln 4-1>0,根据函数零点的存在性定理可得,函数f(x)的零点位于区间(1,2)上.故选D.【题组三 零点个数的判断】1.(2020·浙江高一课时练习)函数在区间(0,1)内的零点个数是( )A.0 B.1C.2 D.3【答案】B,在范围内,函数为单调递增函数.又,,,故在区间存在零点,又函数为单调函数,故零点只有一个.2.(2020·全国)函数的零点个数为( )A.3 B.2 C.1 D.0【答案】B【解析】由,由,所以函数的零点个数为2,故选B.3.(2020·山东烟台·高二期末(理))函数零点的个数为( )A.0 B.1 C.2 D.3【答案】B【解析】函数,由,可得,作出和的图象,可得它们有1个交点,则的零点个数为1,故选B.4.在下列区间中,函数f(x)=ex+3x﹣4的零点所在的区间为( )A.(0,14) B.(14,12) C.(12,1) D.(1,23)【答案】C【解析】f′(x)=ex+3>0,f(x)为R上的增函数,f(12)=e12+32-4=e12-52,因为e<254,所以e12<52,所以f(12)<0,但f(1)=e+3﹣4>0,∴f(12)•f(1)<0所以f(x)的零点在区间(12,1),故选:C.【题组四 根据零点求参数】1.(2019·湖南天心·长郡中学)已知函数在区间内有唯一零点,则的取值范围是( )A. B. C. D.【答案】D【解析】因为函数在区间内有唯一零点,故在区间上只有一个根.又在上单调递减,其值域为.故要满足题意,只需.故选:D.2.(2020·吉林长春外国语学校高二开学考试)函数的一个零点在区间内,则实数的取值范围是( )A. B. C. D.【答案】C【解析】由条件可知,即a(a-3)
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