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Question

Find the equation of the plane through the line of intersection of the planes and which is perpendicular to the plane

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Solution

The equation of the plane through the intersection of the planes, and , is

The direction ratios, a1, b1, c1, of this plane are (2λ + 1), (3λ + 1), and (4λ + 1).

The plane in equation (1) is perpendicular to

Its direction ratios, a2, b2, c2, are 1, −1, and 1.

Since the planes are perpendicular,

Substituting in equation (1), we obtain

This is the required equation of the plane.


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