ABCD is a parallelogram where A to B=m and B to c=n

F is the midpoint of the line BD.

a) Express FD in terms of m and n.


E is the point such that ADE is a straight line with AD:DE = k:1 and F to E =2n-1/2m.

b) Find the value of k.


Note: Please make sure the final answer says "k=. "