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已知数列{an}的前项和Sn=n3,则a5+a6的值为( ) A.91 B.15...
已知数列{an}的前项和Sn=n3,则a5+a6的值为( )
A.91
B.152
C.218
D.279
考点分析:
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的最小正周期是( )
A.
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B.
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B.A∩B
C.∁
U(A∩B)
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已知向量
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△ABC中,点D在边AB上,CD平分∠ACB,若
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A.
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a+
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b
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b
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a+
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b
D.
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a+
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b
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A.2
B.3
C.4
D.5
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