题目内容：
设Sn为等差数列｛an｝的前n项和，若S3=3，S6=24，则a9= 。
参考答案：
答案解析：
填空题：设Sn为等差数列｛an｝的前n项和，若S3=3，S6=24，则a9= 。
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- 题目类型：填空题
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