摘要:若实数成等差数列.实数成等比数列.则=
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等差数列{an}的各项均为正整数,a1=3,前n项和为Sn,等比数列{bn}中,b1=1,且b2•S2=16,{ban}是公比为4的等比数列
(1)求an与bn
(2)设Cn=
+
+
+…+
,若对任意正整数n,当m∈[-1,1]时,不等式t2-2mt+
>Cn恒成立,求实数t的取值范围.
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(1)求an与bn
(2)设Cn=
1 |
S1 |
1 |
S2 |
1 |
S2 |
1 |
Sn |
3 |
4 |
等差数列{an}的各项均为正整数,a1=3,前n项和为Sn,等比数列{bn}中,b1=1,且b2•S2=16,{ban}是公比为4的等比数列
(1)求an与bn
(2)设Cn=
+
+
+…+
,若对任意正整数n,当m∈[-1,1]时,不等式t2-2mt+
>Cn恒成立,求实数t的取值范围.
查看习题详情和答案>>
(1)求an与bn
(2)设Cn=
1 |
S1 |
1 |
S2 |
1 |
S2 |
1 |
Sn |
3 |
4 |