新高考數(shù)學一輪復習8.2 解析式（精練）（基礎版）（原卷版）

8.2解析式（精練）（基礎版）題組一題組一待定系數(shù)法求解析式1．（2022·全國·高三專題練習）若SKIPIF1<0是SKIPIF1<0上單調(diào)遞減的一次函數(shù)，若SKIPIF1<0，則SKIPIF1<0__．2．（2022·全國·高一課時練習）已知SKIPIF1<0是一次函數(shù)，SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<03.．（2022·江蘇·）（1）已知SKIPIF1<0是一次函數(shù)，且SKIPIF1<0，求SKIPIF1<0；（2）已知SKIPIF1<0是二次函數(shù)，且滿足SKIPIF1<0，求SKIPIF1<0.4．（2022·云南）（1）已知f（x）是一次函數(shù)，且滿足f（x＋1）－2f（x－1）＝2x＋3，求f（x）的解析式．（2）若二次函數(shù)g（x）滿足g（1）＝1，g（－1）＝5，且圖象過原點，求g（x）的解析式．題組二題組二換元法求解析式1．（2022·全國·高三專題練習）已知SKIPIF1<0，且SKIPIF1<0，則SKIPIF1<0的值為_________．2．（2022·全國·高一專題練習）已知SKIPIF1<0，則有（

）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<03．（2022·全國·課時練習）已知SKIPIF1<0，則SKIPIF1<0（

）．A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<04．（2023·全國·高三專題練習）已知SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<05．（2022·河南·臨潁縣第一高級中學高二階段練習（文））已知SKIPIF1<0，則SKIPIF1<0（

）．A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<06．（2022·山西運城·高二階段練習）已知函數(shù)SKIPIF1<0滿足SKIPIF1<0，則SKIPIF1<0（

）A．1 B．9 C．SKIPIF1<0 D．SKIPIF1<07．（2023·全國·高三專題練習）設SKIPIF1<0，SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<08．（2022·江蘇）設函數(shù)SKIPIF1<0，則SKIPIF1<0的表達式為（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<09．（2022·甘肅·甘南藏族自治州合作第一中學）已知f（SKIPIF1<0x-1）=2x-5，且f（a）=6，則a等于（）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<010．（2022·陜西·略陽縣天津高級中學二模（理））若SKIPIF1<0，則SKIPIF1<0等于（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<011（2022·全國·高三專題練習）已知函數(shù)SKIPIF1<0，求SKIPIF1<0的解析式．12．（2022·全國·課時練習）（多選）若函數(shù)SKIPIF1<0，則（

）A．SKIPIF1<0 B．SKIPIF1<0C．SKIPIF1<0 D．SKIPIF1<013（2022·黑龍江）若函數(shù)SKIPIF1<0，則SKIPIF1<0__________.題組三題組三解方程組求解析式1（2022·廣東）已知函數(shù)f(x)滿足f(x)＋2f(3－x)＝x2，則f(x)的解析式為（

）A．f(x)＝x2－12x＋18B．f(x)＝SKIPIF1<0－4x＋6C．f(x)＝6x＋9D．f(x)＝2x＋32．（2021·陜西安康）已知函數(shù)SKIPIF1<0滿足SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<03．（2022·廣西）若函數(shù)SKIPIF1<0滿足SKIPIF1<0，則SKIPIF1<0（

）A．SKIPIF1<0 B．SKIPIF1<0 C．SKIPIF1<0 D．SKIPIF1<04．（2021·全國·課時練習）已知SKIPIF1<0，求SKIPIF1<0的解析式.5（2022廣西）若對任意實數(shù)SKIPIF1<0，均有SKIPIF1<0，求SKIPIF1<0=6．（2022·全國·高三專題練習）已知函數(shù)f(x)滿足3f(x﹣1)+2f(1﹣x)=2x，則f(x)的解析式為___________.7．（2021·湖北）已知函數(shù)SKIPIF1<0滿足SKIPIF1<0，則SKIPIF1<0___________.8．（2023·全國·高三專題練習）若SKIPIF1<0，則SKIPIF1<0______．9．（2021·江蘇·南京市金陵中學河西分校高一期中）已知f(x)＋2f(－x)＝2x＋3，則f(x)＝______．題組四題組四配湊法求解析式1．（2022·廣西北海）若函數(shù)SKIPIF1<0，且SKIPIF1<0，則實數(shù)SKIPIF1<0的值為（

）A．SKIPIF1<0 B．SKIPIF1<0或SKIP