题目内容：
[单选题,20分] 如果(x+1)+(x+4)+......+(x+28)=155 ,那么x是A.1
B.2
C.3
D.4
参考答案：
选择题：[单选题,20分] 如果(x+1)+(x+4)+......+(x+28)=155 ,那么x是A.1
- 题目分类：河南理工大学—高等数学（上）
- 题目类型：选择题
- 查看权限：VIP
A.1
B.2
C.3
D.4
A.1
B.2
C.3
D.4
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填空题,20分] 设 是圆柱面x2+y2=4 介于 ， z=3之间部分的外侧，则 ．