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If a tangent of slope 3 on the ellipse x2a2+y2b2=1 is normal to the circle 2x2+2y2+8x+1=0, then the maximum value of ab is

Answer» If a tangent of slope 3 on the ellipse x2a2+y2b2=1 is normal to the circle 2x2+2y2+8x+1=0, then the maximum value of ab is


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