66 lines
658 B
Plaintext
66 lines
658 B
Plaintext
ans
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041231
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$(1,0)$
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041232
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$\dfrac{\pi}{4}$
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041233
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$(1,-2)$
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041234
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$2$
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041235
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$0.5$
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041236
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$\dfrac{16\pi}{3}$
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041237
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$2$
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041238
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$\dfrac{1}{6}$
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041239
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$0.03$
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041240
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$\dfrac{1}{3}$
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041241
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$10$或$11$
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041242
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$\dfrac{4\pi}{3}$
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041243
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A
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041244
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D
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041245
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C
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041246
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D
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041247
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(1) $a_1=10$, $d=11$; (2) $44$
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041248
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(1) $\dfrac{\pi}{3}$; (2) $\dfrac{\sqrt{3}}{3}$
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041249
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(1) $3$; (2) $30$; (3) $32$
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041250
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(1) 证明略; (2) $\arccos\dfrac{1}{3}$; (3) 总长为$2a$, 经过四条棱的中点的空间四边形, 理由略
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041251
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$(\pm\sqrt{3},0)$; (2) 存在, $\lambda=\dfrac{23}{9}$, 定值为$\dfrac{80}{3}$; (3) 如$S$在直线$x=1$上, 证明略
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