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If the circles x2+y2=9 and x2+y2−8x−6y+n2=0,n∈Z have exactly two common tangents, then the number of possible values of n is

Answer» If the circles x2+y2=9 and x2+y28x6y+n2=0,nZ have exactly two common tangents, then the number of possible values of n is


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