Answer:
BC = q +p
Step-by-step explanation:
b)
Here's one way to get there. Two vector sums are the same if they have the same starting and ending points. The sum AC can be expressed two ways:
AB +BC = AD +DC
p +BC = q +2p . . . . . . using givens, and your result from part (a)
Subtract p from both sides:
BC = q +p
