64 lines
770 B
Plaintext
64 lines
770 B
Plaintext
ans
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012655
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$\{2\}$
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012656
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$(-1,1)$
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012657
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$\sqrt{5}$
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012658
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$5$
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012659
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$3$
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012660
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$0.3$
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012661
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$\dfrac{\sqrt{3}}3\pi$
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012662
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$2$
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012663
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$96$
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012664
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$\dfrac 53$
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012665
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$60^\circ$
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012666
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$2021$
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012667
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B
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012668
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A
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012669
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C
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012670
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B
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012671
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(1) $[k\pi-\dfrac{5\pi}{12},k\pi+\dfrac\pi{12}]$, $k\in \mathbf{Z}$; (2) $\sqrt{13}$或$\sqrt{61}$
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012672
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(1) 证明略; (2) $a_n=3^n-2$; (3) $a_1+a_3+a_5+a_7+a_9=22133$
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012673
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(1) 证明略; (2) $\arccos \dfrac{\sqrt{10}}{10}$; (3) $\dfrac 13$
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012674
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(1) $\dfrac{x^2}{12}+\dfrac{y^2}4=1$; (2) $3+2\sqrt{3}$; (3) 存在, $m$的取值范围为$[-\dfrac{\sqrt{3}}3,0)$
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012675
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(1) 当$a=0$时, $f(x)$是偶函数; 当$a\ne 0$时, $f(x)$既不是奇函数又不是偶函数; (2) $(-1,\dfrac 5{27})$; (3) $[2\ln 2-2,1]$ |