
Parametric equation
Find parametric equations for the line through the point(0,1,2) that is perpendicular to the line x=1+t, y=1t, z=2t and intersects this line.
I am wondering that intersects what line.
Does this question give enough information for calculating?
If yes, how can I calculate it. (Itwasntme)

Find parametric equations for the line through the point(0,1,2) that is perpendicular to the line x=1+t, y=1t, z=2t and intersects this line.
"this line" refers to the line given parametrically by x=1+t, y=1t, z=2t.
Otherwise, the problem would have been asking you to find a line that intersects itself, which is stupid. Still, as it is now, the "and intersects this line" bit is redundant/useless information (since by definition, two perpendicular lines INTERSECT to form a 90 degree angle).
Rewrite the problem lopping off the last 4 words, i.e.,
Find parametric equations for the line through the point(0,1,2) that is perpendicular to the line x=1+t, y=1t, z=2t.

Now does this problem make sense? If not, we can get into that.
Andy