已知两圆C1:(x-3t)2+(y-4t)2=4在圆C2:x2+y2-12x-16y+64=0的内部,则实数t的取值范围为多少
人气：243 ℃ 时间：2020-04-01 09:14:10
解答
o1:(3t,4t) r1=4
o2:(6,8) r2=6
d=√(3t-6)^2+(4t-8)^2
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