ʱ : (优辅资源)广东省揭阳市高三上学期期末调研考试数学(?试题 Word版含答案 - 百度文库ϿʼĶ
ĵ
h(t)?t?ln(2t)h'(t)?1?
1 -------------------------------------------------10?0
th(t)(1,2)h(t)?h(1)?1?ln2?0t?ln(2t)
루ʽìܣ ---------------------------------------------------------------------------------11
ϼ費f(x)û㣮 ------------------------------------------12
ⷨ2f(x)(0,??)ϲ㣻 -------------------------------------------------7
ɣ֪a?1ʱf(x)(0,??)ϵ
f(x)(0,??)һ㣻
-----------------------------------------------------8
0?a?1ʱf(0)??lna?0 ɣ֪x?x2ʱf(x)мСֵ
f(x)С=f(x2)?x2?ln(x2?a)---------------------9
?1?a?1?ln[2(1?a?1)]
1?a?1?t,1?t?2f(x)С?t?ln(2t)
h(t)?t?ln(2t)
1h'(t)?1??0t
------------------------------------------------------10
h(t)(1,2)h(t)?h(1)?1?ln2?0f(x)С?0 ֪0?a?1ʱf(x)(0,??)㣻
Ͽɵúf(x)(0,??)ϲ.-------------------- -----------------------12֡ ѡ⣺
22⣺ֱl(?1,1)-----------------------------------------------------------------2
???cos??2??(?cos??2)
CͨΪx?y?(x?2)y?4x?4---5
222222ĵ
ĵ
?x??1???????4?y?1???
ֱ
l2t2ͨΪy?x?2----------------------------------62t2ļ귽Ϊ
?sin???cos??2
------------------------------------------------8
C???cos??2 sin??1ȡ??
23⣺m?1ʱf(x)?|x?1|?|x?2|-------------------------------------------------1
||x?1|?|x?2||?|(x?1)?(x?2)|?3-------------------------------------------------3
?2??2ֱlCĽΪ(2,?2------------10)
??3?|x?1|?|x?2|?3f(x)ֵΪ[?3,3]------------------------------ 5
m=1ʱʽf(x)?3x|x?1|?|x?2|?3x------------------------------- -6
ٵx??1ʱ?x?1?x?2?3xx?7
ڵ?1?x?2ʱx?1?x?2?3xx?1??1?x?1 --------------- 8
۵x?2ʱx?1?x?2?3xx??1⣻ ------------------------9
ԭʽĽ⼯Ϊ(??,1) -----------------------------------------------------10
1?x??1 --------------------- 5ĵ