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《考点5、函数与方程函数模型及其应用》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、温馨提示：高考题库为Word版，请按住Ctrl，滑动鼠标滚轴，调节合适的观看比例，点击右上角的关闭按钮可返回目录。【考点5】函数与方程、函数模型及其应用2009年考题1.（2009福建高考）函数的图象关于直线对称。据此可推测，对任意的非零实数a，b，c，m，n，p，关于x.0的方程的解集不可能是（）A.BCD【解析】选D.本题用特例法解决简洁快速，对方程中分别赋值求出检验即得.2.（2009福建高考）若函数的零点与的零点之差的绝对值不超过0.25，则可以是（）A.B.C.D.【解析】选A.的零点为x=,的零点为x=1,的零点为x=0,的零点为x=.现
2、在我们来估算的零点，因为g(0)=-1,g()=1,所以g(x)的零点x(0,),又函数的零点与的零点之差的绝对值不超过0.25，只有的零点适合。3.（2009海南宁夏高考）用min{a,b,c}表示a,b,c三个数中的最小值,设f（x）=min{,x+2,10-x}(x0),则f（x）的最大值为（）A.4B.5C.6D.7【解析】选C.画出y＝2x，y＝x＋2，y＝10－x的图象，如右图，观察图象可知，当0≤x≤2时，f（x）＝2x，当2≤x≤3时，f（x）＝x＋2，当x＞4时，f（x）＝10－x，f（x）的最大值在x＝4时取得为6，故选C。4.（
3、2009湖南高考）设函数在integratedenergy,chemicalsandtextileYibincity,arethethreecorepillarsoftheindustry.In2014,thewuliangyebrandvalueto73.58billionyuan,thecity'sliquorindustrysliptostabilise.Promotingdeepdevelopmentofintegratedenergy,advancedequipmentmanufacturingindustry,changningdistr
4、ict,shalegasproductioncapacityreached277millioncubicmetres,builtthecountry'sfirstindependenthigh-yieldwellsandpipelinesinthefirstsection,theleadinfactoryproductionandsupplytothepopulation.2.1-3GDPgrowthfigure2.1-4Yibin,Yibincity,Yibincity,fiscalrevenuegrowth2.1.4topographyterra
5、inoverallisSouthwest,North-EasternState.Lowmountainsandhillsinthecitylandscapeasthemainridge-and-Valley,pingbasmallfragmentednaturepicturefor"waterandthesecondlandofthesevenhills".236metersto2000metersabovesealevelinthecity,lowmountain,46.6%hills45.3%,pingbaonly8.1%.2.1.5develo
6、pmentofYibinlandscapesanddistinctivefeatureinthecenterofthecity,withlimitations,andspatialstructureoftypicalzonalgroup,2012-citiesinbuildingwithanareaofabout76.2km2.Fromcity-buildingsituation,"oldtown-theSouthBank"Centerconstructionislaggingbehind,disintegrationoftheoldcityissl
7、ow,optimizationandupgrading,qualitypublicserviceresourcesarestillheavilyconcentratedintheoldtowntogether.SouthbankCentrehasnotbeenformed,functionsoftheserviceareaspaceismissing.Meanwhile,peripheralgroupcentresservicewasweakandinadequateaccountingforcitydevelopment,"suspicious"p
8、atterncouldnotbeformed.Asregardstransport,withtheoutwa
