Answer :

The vector equation of a line passing through a point with position vector and parallel to a vector is

⇒

Given, the line passes through (1, 2, -4)

So,

Given, line is parallel to both planes

∴ Line is perpendicular to normal of both planes.

i.e is perpendicular to normal of both planes.

we know that -

is perpendicular to both &

So, is cross product of normals of planes

and

Required Normal

Thus,

Now, putting the value of & in formula

Therefore, the equation of the line is

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