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过点A(a,a)可作圆x2+y2-2ax+a2+2a-3=0的两条切线,则实数a...
过点A(a,a)可作圆x
2+y
2-2ax+a
2+2a-3=0的两条切线,则实数a的取值范围为( )
A.a<-3或
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B.
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C.a<-3
D.-3<a<1或
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