Vectors (Planes) question from 1989

Hi,

The plane has the point A (whose position vector is a) and its normal is the direction vector n of the line L yes?

Now consider the dot product form of the equation of the plane, i.e. r.n = a.n.

Try it, thanks!

Cheers,
Wen Shih

Hi,

But then, the problem statement says plane is perpendicular to L yes?

Thanks!

Cheers,
Wen Shih

Hi,

Great effort! It is important to develop the skill of reading deeply the requirements of the problem. Jiayou!

Cheers,
Wen Shih