首页
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,,,…,...
试题详情
在等差数列{a
n}中,公差d≠0,a
2是a
1与a
4的等比中项,已知数列a
1,a
3,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAgCAYAAAD5VeO1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAD9SURBVEhL7ZTRDcMgDEQ9GTt5HZbxKIzi+gJp
gdLEJGmlSkHJDyLvzPkc0i8u+iJbb/jQ3d/ZIkxKhJdVhJVYTvW7VJ40BtIQU4GJsomcZOe0oOIX
GDsQC/rUOlg/aYoaQjRctUZ7BwQoxTCour/JAbJ9Qq0l2WsiWJLUnlMr27IAS0q0FqjYSA/O9BZu
yM/l3ATaxm9fbAouPJegCTjssuFaYrrauN14Pxy9KVMlDJH95YYjsmAjXd7JdcJbK66FVxP7/qv4
bI+r8maKkfcl63ab2DrfC7vgrc/jIUMBGLJ6Dlzw/VzkE/1/6obftoyzs0axjuOlaell/xf+ANlu
3RL9cQ0mAAAAAElFTkSuQmCC
)
,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABcAAAAgCAYAAAD5VeO1AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEnSURBVEhL7ZbtDYQgDIY7GTt1nS7TURil1/Jx
gHIKipdcckT/GH1a3r4tgjy44EG2/OFddb8nCyMIgN0ozCiAfKveKXMv5EAc+QRjQQ1ykx3dYhkX
sD2xYE7esS7mD+JJnCPFVav37EIA8OQ6WW93coGsn0ArSdQawCTxotetFWUJwOQSqQNUbHOPvbOV
8CD8nM81QFv4441NwRnnHDQBN7m0uYJNs4zHhR+HW21SVzFakPM1DDfLGtvcNdq5g/BWirXwqmP3
o+KzPEOZN11sfg9e191QVr7eWanHELzVed9knvA95MLYTo02BD/3xWboBcvqbJn6cOjl3A9PwLX4
mA6C5ZkzlbNhKTw3WlZvGbw9dFht6tcUtPw15IEWp+eyzHtG+l34C89L04JIwMJzAAAAAElFTkSu
QmCC
)
,…,
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABoAAAAgCAYAAAAMq2gFAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEuSURBVEhL7ZYBDsIgDEV7Mu7EdbgMR+EotR+Y
A0TtWJ2JkWiyTNjzf/rLiC8adBGH/6Blp79jXfTERPh6jtEz+bisYFxYFSUOjtiFVH+P7AVoyClV
ByU7BHcAdnznGugiToGdC/LoZszunYRRCm6iZlR4kiLLqbet7A0RbEssH7NRrMsPr9XGLazhoAox
Z7RZ+VeO5UhgfdEoKbBOPxXVuV6JB0CwVIKcS3+zWl80ehD2siY4egCPDTUIMQAHVbrSMZSg3q7P
gZpO8diudBaqFHXdA3nKWRKVQb9TKlC/L08C/UaYCqQz5/UsI1BVmS1tr3e4DQgNOLenKGGWjOX+
2WfNBrQdngLJh+XkNcAIBLsQ6HKuzEJtA2oVTGwD3ATUKdjOraF9mIA05f97oBuElE9oVoX66gAA
AABJRU5ErkJggg==
)
,…成等比数列,求数列{k
n}的通项k
n.
相关试题
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
在等差数列{an}中,公差d≠0,a2是a1与a4的等比中项,已知数列a1,a3,
,
,…,
,…成等比数列,求数列{kn}的通项kn.
-
等差数列{an}中,公差d≠0,已知数列
,
,
…
…是等比数列,其中k1=1,k2=7,k3=25.
(1)求数列{kn}的通项公式kn;
(2)若a1=9,bn=
(n∈N+),Sn是数列{bn}的前n项和,求证
.