# Vector & 3D Classes

Previews of all the 17 classes can be seen below.

# Vectors $\overrightarrow {AB} = 3\hat i + 4\hat k$ and $\overrightarrow {AC} = 5\hat i - 2\hat j + 4\hat k$

If the vectors and are the sides of a triangle ABC, then the length of the median through A is:

(1)         (2)         (3)         (4)

[JEE Main 2013]