Tuesday

March 3, 2015

March 3, 2015

Posted by **HongKit** on Wednesday, October 17, 2012 at 12:14pm.

Construct a vector equation for the line that does go through the point (1,2), and is perpendicular to r.

and

Determine the point of intersection of the two lines

- math -
**Steve**, Wednesday, October 17, 2012 at 3:18pmyou know that i-j is perpendicular to -i-j since (-1)(1) + (-1)(-1) = -1+1 = 0

so, i+2j + alpha(i - j) will do the trick

1-lambda = 1 + alpha

3-lambda = 2 - alpha

intersect where lambda = 1/2 alpha = -1/2, at the point (1/2,5/2)

**Answer this Question**

**Related Questions**

Precalc - A line in space has the vector equation shown here. Fill in the blanks...

Discrete Math: Equations of Line in a Plane - I'm stuck on these questions. Can ...

Math: Equations of Line in a Plane - I'm stuck on these questions. Can you ...

Math/Vectors - I need help on a homework problem. "Determine a vector equation ...

Applied Maths - Given that position vector a=4i+2j, position vector b=13i+5j are...

Maths Vector Helpppp - The points A and B have position vectors, relative to the...

Precalc - At the point were a line intersects a plane [with the equation (24x+...

Calculus - A line has Cartesian equation 3x-2y+3=0 .Determine a direction vector...

Calc. for Reiny - this can be done by projections of two vector. recall that the...

Calculus - Write a vector equation AND parametric equations of the line through ...