Cirlce ( add amth)

2008-11-27 3:23 am

Consider two circles x^2+y^2=16 and x^2+y^2-4y-4=0.Find a circle passing through their intersections and having an area of 9(PAI)
square units.

回答 (1)

2008-11-27 4:03 am

✔ 最佳答案

可以教你做,先做聯立方程,計出2個交點,
再用圓周率*R=9,計R,
將圓心設做(x,y)用distance formula,計x,y,同交點之間既距離同埋設做1式,
再用其中一條distance formula=R設上第2式,再做聯立,就可以計到圓心,再用圓形公式,就計到個圓形既EQUATION

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