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在极坐标系中,圆ρ=2sinθ的圆心与点D(1,π)的距离为 .
在极坐标系中,圆ρ=2sinθ的圆心与点D(1,π)的距离为 .
考点分析:
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已知向量
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=(2,4),
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⊥(
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+λ
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),则实数λ的值是
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A.1
B.
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D.
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