配套习题-等比数列常见性质的应用 -【青果学院】

本课配套习题挑战模式1/3

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单选题

难度系数：

1.已知等比数列1，a²，9，…，则该等比数列的公比为（　　）

A: 3或-3

B: 3或

C: 3

D:

提示1：IOeUseetieavlOaVsOWIl+eahOmAmumhueWFrOW8j+WPr+W+lzk9McOXYTxzdXA+NDwvc3VwPu+8jOino+W+lyBhPHN1cD4yPC9zdXA+PTPvvIzku47ogIzlvpfliLDlhazmr5Q=
答案：Qw==
6Kej77ya55Sx6aKY5oSP5Y+v5b6XIDk9McOXYTxzdXA+NDwvc3VwPu+8jOKItGE8c3VwPjI8L3N1cD49M++8jOaVheWFrOavlOS4ujxpbWcgd2lkdGg9NDYgaGVpZ2h0PTQ1IHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvRkUvQ0YvckJBQ0UxTlExdE95NG92R0FBQUNBVG11S19VMjExLnBuZyI+IDxicj7mlYXpgIkgQy4g

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单选题

难度系数：

2.数列{a_n}是公比q≠1的等比数列，若其中a_m，a_n，a_p依次成等比数列，那么自然数m，n，p之间的关系是：（　　）

A: n²=mp

B: p²=mn

C: 2n=m+p

D: 2p=m+n

提示1：5qC55o2u562J5q+U5pWw5YiX55qE5oCn6LSo77yM6IulIG3jgIFu44CBcOOAgXHiiIhOKu+8jOS4lG0rbj1wK3HvvIzliJlhPHN1Yj5tPC9zdWI+JiM4MjI2O2E8c3ViPm48L3N1Yj49YTxzdWI+cDwvc3ViPiYjODIyNjthPHN1Yj5xPC9zdWI+
答案：Qw==
6Kej77ya5qC55o2u562J5q+U5pWw5YiX55qE5oCn6LSo77yM6IulIG3jgIFu44CBcOOAgXHiiIhOKu+8jOS4lG0rbj1wK3HvvIzliJlhPHN1Yj5tPC9zdWI+JiM4MjI2O2E8c3ViPm48L3N1Yj49YTxzdWI+cDwvc3ViPiYjODIyNjthPHN1Yj5xPC9zdWI+77ybPGJyPuKItWE8c3ViPm08L3N1Yj7vvIxhPHN1Yj5uPC9zdWI+77yMYTxzdWI+cDwvc3ViPuS+neasoeaIkOetieavlOaVsOWIlzxicj7iiLRhPHN1cD4yPC9zdXA+PHN1Yj5uPC9zdWI+PWE8c3ViPm08L3N1Yj5hPHN1Yj5wPC9zdWI+77yMPGJyPuKItDJuPW0rcDxicj7mlYXpgIlD

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单选题

难度系数：

3.若等比数列{a_n}满足a_n•a_n+1=9ⁿ，则公比q=

A: 1

B: 2

C: 3

D: 4

提示1：IOWIqeeUqOetieavlOaVsOWIl+eahOmAmumhueWFrOW8j+W+l+WIsOWFs+S6jnHnmoTmlrnnqIs=
答案：Qw==
6Kej77ya5b2Tbj0x5pe277yM5Y+v5b6XYTxzdWI+MTwvc3ViPmE8c3ViPjI8L3N1Yj49Oe+8jOW9k249MuaXtu+8jGE8c3ViPjI8L3N1Yj5hPHN1Yj4zPC9zdWI+PTgx77yMPGJyPuebuOmZpOWPr+W+lzxpbWcgd2lkdGg9NTIgaGVpZ2h0PTQ2IHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvRkUvQ0YvckJBQ0UxTlExdEh6N0I5LUFBQUNUTXluSUtRODU3LnBuZyI+PTnvvIxxPcKxMy4gPGJyPuW9k3E9LTPml7bvvIznlLHnrYnmr5TmlbDliJfnmoTlrprkuYnlj6/lvpdhPHN1Yj4xPC9zdWI+YTxzdWI+Mjwvc3ViPu+8nDDvvIzmlYXoiI3ljrsuIDxicj7iiLTlhazmr5RxPTPvvIw8YnI+5pWF562U5qGI5Li6My4g