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if the equation of tangent to the circle x2+y2−6x+4y−12=0 which are parallel to the line 4x+3y+5=0 is ax+by+c=0,find the value of −(ab+cb), where ∣∣ca∣∣>6 ___

Answer»

if the equation of tangent to the circle x2+y26x+4y12=0 which are parallel to the line 4x+3y+5=0 is ax+by+c=0,find the value of (ab+cb), where ca>6


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