1.

Locus of a point 'P' such that PA+PB =4, where A=(2,3,4), B=(-2,3,4) is

Answer»

`y^(2)-Z^(2)+6y-8z+25 = 0`
`y^(2)+z^(2)-6y-8z+25 = 0`
`y^(2)-z^(2)-6y-8z+25 = 0`
`y^(2)+z^(2)-6y-8z+25 = 0`

ANSWER :B


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