圆(x-1)^2+(y-1)^2=2 被X轴截得的弦长等于()
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圆(x-1)^2+(y-1)^2=2被X轴截得的弦长等于()圆(x-1)^2+(y-1)^2=2被X轴截得的弦长等于()圆(x-1)^2+(y-1)^2=2被X轴截得的弦长等于()首先,作出图像,过圆
圆(x-1)^2+(y-1)^2=2 被X轴截得的弦长等于()
圆(x-1)^2+(y-1)^2=2 被X轴截得的弦长等于()
圆(x-1)^2+(y-1)^2=2 被X轴截得的弦长等于()
首先,作出图像,过圆心作X轴垂线,连结圆心 与 圆心和X轴焦点.构建RT△.
斜边为半径,即根号2
最短边为(根号2)减1
然后,由勾股定理得,另一条直角边长为根号下【(2根号2)减1】
最后,根号下【(2根号2)减1】再乘以2 (因为有两段) 得到最后的结果,就是被X轴截得的弦长
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