1.

Find the equation of all common tangents of the circles (i) x^(2)+y^(2)=9 and x^(2)+y(2)-16x+2y+49=0 (ii) x^(2)+y^(2)+4x+2y-4=0 and x^(2)+y^(2)-4x-2y+4=0

Answer»


ANSWER :(i) `4x-3y-15=0,y-3=0, 12x+5y-39=0`,
`16x+63y+195=0`
(II) `y-2=0,4x-3y-10=0,x-1=0,3x+4y-5=0`


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