(Ⅰ)證明:當(dāng)時(shí).對(duì)任意正整數(shù).不等式成立, 查看更多

 

題目列表(包括答案和解析)

設(shè)正整數(shù)數(shù)列{an}滿足a1=2,a2=6,當(dāng)n≥2時(shí),有|
a
2
n
-an-1an+1| <  
1
2
an-1

(1)求a3的值;(2)求數(shù)列{an}的通項(xiàng);
(3)記Tn=
12
a1
+
22
a2
+
32
a3
 +K+
n2
an
,證明:對(duì)任意n∈N*Tn
9
4

查看答案和解析>>

設(shè)正整數(shù)數(shù)列{an}滿足a1=2,a2=6,當(dāng)n≥2時(shí),有
(1)求a3的值;(2)求數(shù)列{an}的通項(xiàng);
(3)記,證明:對(duì)任意n∈N*,

查看答案和解析>>

正項(xiàng)數(shù)列滿足
(1)若,求的值;
(2)當(dāng)時(shí),證明: ;
(3)設(shè)數(shù)列的前項(xiàng)之積為,若對(duì)任意正整數(shù),總有成立,求的取值范圍

查看答案和解析>>

正項(xiàng)數(shù)列滿足

(1)若,求的值;

(2)當(dāng)時(shí),證明: ;

(3)設(shè)數(shù)列的前項(xiàng)之積為,若對(duì)任意正整數(shù),總有成立,求的取值范圍

 

查看答案和解析>>

正項(xiàng)數(shù)列滿足
(1)若,求的值;
(2)當(dāng)時(shí),證明: ;
(3)設(shè)數(shù)列的前項(xiàng)之積為,若對(duì)任意正整數(shù),總有成立,求的取值范圍

查看答案和解析>>


同步練習(xí)冊(cè)答案