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截距相等,設直線的方程設直線的方程的方程是:x/a+y/a=1化為一般式是:x+y-a=0與圓相切,圓心是(0,-5),則圓心到直線的距離等於半徑根據點到直線的距離公式有d²;=(0-5-a)²;/(1& sup2;+1²;)=3(5+a)²;=6…
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