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【简答题】
已知x=-3,y=- 1 3 ,求代数式 1 3 (3 x 2 -y)- 2 3 (2 x 2 +y) 的值.
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参考答案:
举一反三
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【多选题】如果随机过程X(t)是广义平稳的,那么它一定具有_______特点。
A.
自相关函数与时间起点无关
B.
满足各态历经的性质
C.
严格平稳
D.
均值是常数
E.
自相关函数与时间间隔有关
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B.
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C.
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D.
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A.
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B.
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C.
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【多选题】广义平稳随机过程满足的条件是
A.
数学期望是常数
B.
任意有限维分布函数与起点无关
C.
具有各态历经性
D.
自相关函数只与时间间隔有关
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