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User:Luosiji
20
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{\displaystyle 20x^{2}+2y^{2}-5=0\!}
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{\displaystyle 36x^{2}+68xy+36y^{2}-136x-144y+139=0\!}
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{\displaystyle y-{\frac {|x|}{12}}=-{\frac {4}{5}}{\sqrt[{3}]{\left(\left|x\right|+{\frac {y}{12}}-{\frac {9}{4}}\right)^{2}}}+2\!}
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{\displaystyle y-{\frac {|x|}{6}}={\frac {1}{2}}{\sqrt[{3}]{\left(\left|\left|x\right|+{\frac {y}{6}}-{\frac {9}{4}}\right|-1\right)^{2}}}-{\frac {6}{5}}\!}
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{\displaystyle {\sqrt[{3}]{x^{2}}}\pm {\sqrt {9-x^{2}}}\!}
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{\displaystyle \sum _{i=0}^{n}\sum _{j=1}^{m}{m \choose j}{i}^{m-j}={\left(n+1\right)}^{m}}
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{\displaystyle \sum _{i=0}^{n}{\left(i+1\right)}^{m}-{i}^{m}={\left(n+1\right)}^{m}}
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{\displaystyle E[T]\leq \lfloor \log _{n}m\rfloor +1+{\frac {m-1}{m}}{\frac {n}{n-1}}.}
![{\displaystyle y-{\frac {|x|}{12}}=-{\frac {4}{5}}{\sqrt[{3}]{\left(\left|x\right|+{\frac {y}{12}}-{\frac {9}{4}}\right)^{2}}}+2\!}](https://wikimedia.org/api/rest_v1/media/math/render/svg/aa457a862438e97aef3ba9c19493ac82be238965)
![{\displaystyle y-{\frac {|x|}{6}}={\frac {1}{2}}{\sqrt[{3}]{\left(\left|\left|x\right|+{\frac {y}{6}}-{\frac {9}{4}}\right|-1\right)^{2}}}-{\frac {6}{5}}\!}](https://wikimedia.org/api/rest_v1/media/math/render/svg/3ef56dc541a8b7423d3b4d73ce664f1de0331405)
![{\displaystyle {\sqrt[{3}]{x^{2}}}\pm {\sqrt {9-x^{2}}}\!}](https://wikimedia.org/api/rest_v1/media/math/render/svg/b0b1b549cd582f9a9c00db2956556db803fcdbc8)
![{\displaystyle E[T]\leq \lfloor \log _{n}m\rfloor +1+{\frac {m-1}{m}}{\frac {n}{n-1}}.}](https://wikimedia.org/api/rest_v1/media/math/render/svg/2bc3240bbdb995ee65ba7caac3aa55f4a5db9c6a)