1.

Two systems of rectangular axes have the same origin. If a plane cuts them at distances a, b, c and a^(1),b^(1),c^(1) from the origin, then

Answer»

`(1)/(a^(2))+(1)/(B^(2))-(1)/(C^(2))+(1)/(a^(,2))-(1)/(b^(,2))-(1)/(c^(,2))=0`
`(1)/(a^(2))-(1)/(b^(2))-(1)/(c^(2))+(1)/(a^(,2))-(1)/(b^(,2))-(1)/(c^(,2))=0`
`(1)/(a^(2))+(1)/(b^(2))+(1)/(c^(2))-(1)/(a^(,2))-(1)/(b^(,2))-(1)/(c^(,2))=0`
`(1)/(a^(2))+(1)/(b^(2))+(1)/(c^(2))+(1)/(a^(,2))+(1)/(b^(,2))+(1)/(c^(,2))=0`

ANSWER :C


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