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/第2课时最值与范围、证明问题/1.解:(1)设点P(x0,y0),M(x,y),则D(0,y0),因为点M为线段PD的中点,所以{x=x02,y=y0,即{x0=2x,y0=y,又点P在圆O:... 2026-05-1840127.55 KB7页223
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