1/4单选题
难度：
1.
已知在等比数列 {an} 中，公比q 是整数，a1+a4 ＝18， a2+a3 ＝12，则此数列的前8项和为( )
| A | 514 |
| B | 513 |
| C | 512 |
| D | 510 |
- 提示1：
- 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
正确答案：RA==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzZCLzhGL3JCQUNFMVMxeWVyaVp6dUxBQUFUY1g1Q09vODc2NC5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNkIvOEYvckJBQ0UxUzF5ZXJpWnp1TEFBQVRjWDVDT284NzY0LnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogNDgycHg7IGhlaWdodDogOTVweDsiPjxicj48L3A+
2/4单选题
难度：
2.
| A | 5 |
| B | 8 |
| C | -8 |
| D | 15 |
- 提示1：
- 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
正确答案：QQ==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzZCLzkwL3JCQUNFMVMxeTBQaVl4a1pBQUFNbC1UOGVNczk1MS5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNkIvOTAvckJBQ0UxUzF5MFBpWXhrWkFBQU1sLVQ4ZU1zOTUxLnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogNjMzcHg7IGhlaWdodDogNTJweDsiPjxicj48L3A+
3/4单选题
难度：
3.
| A | -4 |
| B | -1 |
| C | 0 |
| D | 1 |
- 提示1：
- 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
正确答案：Qg==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzZCLzkwL3JCQUNFMVMxelp6VF9hWWVBQUFQdUFlejI1azE0Mi5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNkIvOTAvckJBQ0UxUzF6WnpUX2FZZUFBQVB1QWV6MjVrMTQyLnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogNTkwcHg7IGhlaWdodDogNjJweDsiPjxicj48L3A+
4/4单选题
难度：
4.
| A | 158 或5 |
| B | 3116 或5 |
| C | 3116 |
| D | 158 |
- 提示1：
- 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
正确答案：Qw==
PHA+PGltZyBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzM3LzkxL3JCQUNKMVMxenlHeFBVX0NBQUFaOTd5SF9lRTA5Ny5wbmciIGRhdGEtY2tlLXNhdmVkLXNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMzcvOTEvckJBQ0oxUzF6eUd4UFVfQ0FBQVo5N3lIX2VFMDk3LnBuZyIgYWx0PSIiIHN0eWxlPSJ3aWR0aDogNTQ5cHg7IGhlaWdodDogMTYycHg7Ij48L3A+