共50条信息
直线\(y=kx+3\)与圆\((x-3)^{2}+(y-2)^{2}=4\)相交于\(M\),\(N\)两点,若\(|MN|\geqslant 2\sqrt{3}\),则实数\(k\)的取值范围是\((\) \()\)
直线\(\ell \):\(kx+y+4=0(k∈R)\)是圆\(C\):\(x^{2}+y^{2}+4x-4y+6=0\)的一条对称轴,过点\(A(0,k)\)作斜率为\(1\)的直线\(m\),则直线\(m\)被圆\(C\)所截得的弦长为\((\) \()\)
直线\(y=x\)被圆\((x−1)^{2}+y^{2}=1\)所截得的弦长为 \((\) \()\)
已知圆\(C\)的方程为\({{x}^{2}}-2x+{{y}^{2}}=0\),直线\(l:kx-y+2-2k=0\)与圆\(C\)交于\(A\),\(B\)两点,则当\(\Delta ABC\)面积最大时,直线\(l\)的斜率\(k=(\) \()\)
圆\(C\)过坐标原点,圆心在\(x\)轴的正半轴上\(.\)若圆\(C\)被直线\(x-y=0\)截得的弦长为\(2\sqrt{2}\),则圆\(C\)的方程是_________.
\(6.\) 已知直线\(l:y=kx+2\)与圆\({x}^{2}+{y}^{2}-2x-2y=0 \)相交于\(A,B\)两点,若\(AB=2\sqrt{2}\),则实数\(k\)的值为__________.
直线\(x+y=0\)被圆\(\begin{cases} x=3\cos θ, \\ y=3\sin θ \end{cases}(θ\)为参数\()\)截得的弦长是\((\) \()\)
圆\({{x}^{2}}+{{y}^{2}}=25\)内过点\((3,0)\)的弦中最短弦长是\((\)
在极坐标系中,直线\(l:p\cos θ=1 \)被圆\(C:p=4\cos θ \)所截得的线段长为________.
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