1.

If the equation of the locus of a point equi-distant from the points (a_(1), b_(1)) and (a_(2),b_(2)) is (a_(1)-a_(2))x+(b_(1)-b_(2))y+c=0 then the value of c is

Answer»

`SQRT(a_(1)^(2)+b_(1)^(2)-a_(2)^(2)-b_(2)^(2))`
`(1)/(2)(a_(2)^(2)+b_(2)^(2)-a_(1)^(2)-b_(1)^(2))`
`a_(1)^(2)-a_(2)^(2)+b_(1)^(2)-b_(2)^(2)`
`(1)/(2)(a_(1)^(2)+a_(2)^(2)+b_(1)^(2)+b_(2)^(2))`

ANSWER :2


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