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66,78,82,( )

A.98
B.100
C.89
D.102

【参考答案】

A
解析：56-5-6＝45＝5×9,66-6-6＝54＝6×9,78-7-8＝63＝7×9,82-8-2＝72......

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指数平滑法得到t+1期的预测值等于()。
A.t期的实际观察值与第t+1期指数平滑值的加权平均值
B.t期的实际观察值与第t期指数平滑值的加权平均值
C.t期的实际观察值与第t+1期实际观察值的加权平均值
D.t+1期的实际观察值与第t期指数平滑值的加权平均值
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