数列(英文题目)14.If the first,second and fifth terms of an A.P.are three consecutive terms of a G.P.,find the common ratio.(3)28.The 3rd,5th and 8th terms of an A.P.are consecutive terms of a G.P.Find the common ratio.(1.5)
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![数列(英文题目)14.If the first,second and fifth terms of an A.P.are three consecutive terms of a G.P.,find the common ratio.(3)28.The 3rd,5th and 8th terms of an A.P.are consecutive terms of a G.P.Find the common ratio.(1.5)](/uploads/image/z/14375890-10-0.jpg?t=%E6%95%B0%E5%88%97%28%E8%8B%B1%E6%96%87%E9%A2%98%E7%9B%AE%2914.If+the+first%2Csecond+and+fifth+terms+of+an+A.P.are+three+consecutive+terms+of+a+G.P.%2Cfind+the+common+ratio.%283%2928.The+3rd%2C5th+and+8th+terms+of+an+A.P.are+consecutive+terms+of+a+G.P.Find+the+common+ratio.%281.5%29)
数列(英文题目)14.If the first,second and fifth terms of an A.P.are three consecutive terms of a G.P.,find the common ratio.(3)28.The 3rd,5th and 8th terms of an A.P.are consecutive terms of a G.P.Find the common ratio.(1.5)
数列(英文题目)
14.If the first,second and fifth terms of an A.P.are three consecutive terms of a G.P.,find the common ratio.(3)
28.The 3rd,5th and 8th terms of an A.P.are consecutive terms of a G.P.Find the common ratio.(1.5)
数列(英文题目)14.If the first,second and fifth terms of an A.P.are three consecutive terms of a G.P.,find the common ratio.(3)28.The 3rd,5th and 8th terms of an A.P.are consecutive terms of a G.P.Find the common ratio.(1.5)
用中文回答:
(1)设1.2.5的值为,p,p2,p5,则p=p3 得出p=±1,common ratio 为±1
(2)设3.5.8的值为,p3,p5,p8,则p2=p3 得出p=1,common ratio 为1