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In th following cases, determine whether...

In th following cases, determine whether the given planes are parallel or perpendicular and in case they are neither, find the angle between them (d) 2x-y+3z-1=0 and 2x-y+3z+3=0

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The correct Answer is:
The direction ratios of the normals to the given planes are 2, -1, 3 and 2, -1 3
Since `(2)/2 = (-1)/(-1) = (3)/3`, the planes are parallel
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A N EXCEL PUBLICATION-THREE DIMENSTIONAL GEOMETRY-QUESTION BANK
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