问题
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10,24,52,78(),164 A 106 B 109 C 124 D 126
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10,24,52,78,(),164 A.106 B.109 C.124 D.126
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设X与y相互独立,D(X)=2,D(Y)=4,那么D(3X-5Y)的值为()。A.118B.2C.110 D.115
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2,4,10,22,52,()。 A.118B.96C.82D.78
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-1,0,4,22,()。A.118B.120C.122D.124
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计算。(1)415×52(2)394×18(3)78×504(4)309×43(5)38×176(6)560×17