Can find the intersection. Line 1 intersects with point A and line B at point P. The parameter equation of line 2 is used to assume the coordinate of p, and then the vector AP is perpendicular to the direction vector of line 2, so as to obtain the parameter value and the coordinate of point P. The straight line 1 passes through point A and point P, and the equation can be obtained.

If the straight line L: (x-a)/m = (y-b)/n = (z-c)/p is known, then the point P(x0, y0, z0) is known.

Then: the plane equation of the intersection point P perpendicular to the known straight line L in space is

m(x-x0)+n(y-y0)+p(z-z0) = 0

Definition:

Equations are divided into equations with unknowns and equations without unknowns.

For example:

X+1= 3-an equation with unknowns;

2+1= 3-an equation without unknowns.

It should be noted that some equations with unknowns have no solutions, but they still have no solutions, such as x+1= x-x.