1.

The equation of the plane passing through the point A(2,3,4) and parallel to the plane `5x-6y+7z=3`, isA. `5x-6y+7z=20`B. `7x-6y+5z=72`C. `20x-18y+14z=11`D. `10x-18y+28z=13`

Answer» Correct Answer - a
Let the prequired equation of the plane be `5x-6y+7z=k`.
Since, it passes through the point A(2,3,4), we have
`(5 xx 2)-6 xx 3 +7 xx 4 =k rArr k=(10-18+28)=20`.
Hence, the required equation of the plane is `5x-6y+7z=20`.


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