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本文就“设而不求”在解析几何中的应用,撷取几例,加以说明。例l 过圆C:x2+y2=1外一点P(2,2)引圆的两条切线PM、PN,求两切点M、N所在直线的方程。
In this paper, the application of “supposition but not seeking” in analytic geometry is illustrated by several examples. Example 1 If the circle C:x2+y2=1 is outside the point, P(2,2) leads to two tangent lines PM and PN. Find the equation of the line where the two points M and N lie.