一、单选题
?1?1.设a?20.2,b????2?A.a?b?c C.b?c?a
?0.3,c?log0.20.3,则a,b,c的大小关系为
B.b?a?c D.c?a?b
2.已知a?log20.3,b?20.3,c?0.30.2,则a,b,c三者的大小关系是 A.a?b?c C.b?c?a
B.b?a?c D.c?b?a
3.已知a?log30.8,b?30.8,c?0.32.1,则 A.a?b?c C.c?a?b 4.已知函数f(x)??A.-7 C.7
B.a?c?b D.c?b?a
?log2x,x?0,则f(1)?f(?1)?
3?4x,x?0?
B.2 D.-4
5.设a?xlnx,b?ylny,c?xlny,其中x?y,则下列说法正确的是 A.a?c?b C.ab?c2
?1
lnxB.b?c?a D.c2?ab
?1?6.若x??e,1?,a?lnx,b???,c?elnx,则a,b,c的大小关系为
?2?A.c?b?a C.a?b?c
x?xB.b?c?a D.b?a?c
?1??1?7.已知函数f(x)??????,则f(x) ?4??4?A.是奇函数,且在?0,???上单调递增 C.是偶函数,且在?0,???上单调递增
B.是奇函数,且在?0,???上单调递减 D.是偶函数,且在?0,???上单调递减
8.设a?0.32.1,b?2.10.3,c?log0.32.1,d?log2.10.3,则a,b,c,d的大小关系
为
A.a?b?c?d C.b?a?c?d
B.d?c?b?a D.b?a?d?c
?1?9.设a????3?A.a>c>b C.c>a>b
?0.213,b?log2,c?lg.则a.b.c的大小关系是.
32B.b>c>a D.c>b>a
10.已知a=log1.10.9, b=0.91.1, c=1.10.9,则a,b,c的大小关系为 A.a
B.a 11.设a?(?2)2,b?log315,c?log420,则a,b,c的大小关系是 A.a?b?c C.b?c?a B.a?c?b D.c?b?a 12.已知x、y、z?R?,且xln2?yln3?zln5,则 A.2x?3y?5z C.3y?5z?2x B.5z?2x?3y D.3y?2x?5z 12322a?log13.已知,b?log2,c??3?,d?e2,则 1??323?2?A.d?c?a?b C.c?d?a?b 14.设a?2lnA.c?a?b C.a?b?c xB.d?b?c?a D.a?c?b?d 311?0.3、b?log2、c?(),则 232 ?xB.a?c?b D.b?a?c 15.函数f(x)?(3?3)?lgx的图象大致为 A. B. C. D. 16.已知x?y,则下列判断正确的是 A.log2x?log2y C.x2?xy B.lg(x?y)?0 D.2x?2y 17.设a?log32,b?log43,c?A.c?a?b C.b?c?a 13,则 4B.b?a?c D.a?c?b b?1?log23,c?ln3,则 18.设 a?c2, A.a?b?c C.c?a?b B.c?b?a D.b?a?c 19.已知实数a?3ln3,b?log2A.a?b?c C.a?c?b ?1,c?sin,则a,b,c的大小关系为 39B.b?c?a D.b?a?c 20.三个数0.76,60.7,log0.76的大小关系为 60.7A.0.7?log0.76?6 0.760.7B.0.7?6?log0.76 60.7D.log0.76?0.7?6 C.log0.76?6?0.76 21.已知a?ln3,b?log0.32,c?0.30.2,则a,b,c的大小关系为
2021届新高考数学(理)二轮复习重难点题型05 指数函数与对数函数(客观题原卷版)
![](/skin/haowen/images/icon_star.png)
![](/skin/haowen/images/icon_star.png)
![](/skin/haowen/images/icon_star.png)
![](/skin/haowen/images/icon_star.png)