Let a line L passing through the point 
be perpendicular to the lines 
and 
. Let the line L intersect the yz -plane at the point Q . Another line parallel to L and passing through the point 
intersects the yz -plane at the point R . Then the square of the area of the parallelogram PQRS is equal to 
.
Text Solution
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(6) 
and 
Line L passes through 
with 
For point 
Another
Line parallel to L passes through 
with 
for point 
Area of parallelogram with adjacent vectors 
and 
Area of parallelogram
Area 
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