共50条信息
曲线\(y= \dfrac{1}{2}{x}^{2} \)在点\(\left(1, \dfrac{1}{2}\right) \)处的切线的倾斜角为\((\) \()\)
如下图,圆\({{x}^{2}}+{{y}^{2}}=8\)内有一点\({{P}_{0}}(-1,2)\),\(AB\)为过点\({{P}_{0}}\)且倾斜角为\(\alpha \)的弦.
\((1)\)当\(\alpha =\dfrac{3\pi }{4}\)时,求\(AB\)的长;
\((2)\)当弦\(AB\)被点\({{P}_{0}}\)平分时,求直线\(AB\)的方程.
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