1.

A variable plane passes through a fixed point (alpha,beta,gamma) and meets the coordinate axes in A,B, and C. let P_(1)P_(2)" and "P_(3) be the planes passing through A,B,C and parallel to the coordinate planes YZ,ZX,XY respectively . Then, the locus of the points of intersection of the planes P_(1)P_(2)" and "P_(3)is

Answer»

`alphax+betay+gammaz=1`
`(alpha)/x,(beta)/y+(gamma)/z=1`
`ax_(2)+betay^(2)+gammaz^(2)=1`
`alphabetax+betagammay+alphagammaz=1`

ANSWER :B


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