yelp (1 Viewer)

[Run hard@thehsc]

 

[#26MysteryMarker]

Thats a grape grape

 

[yanujw]

i) The diagram shows that the 4 vectors enclose a quadrilateral, so the resultant is 0, therefore the sum of the vectors is 0.

ii) MN = (a + b/2) - (a/2)
MN = 1/2(a + b)

QP = (a + b + c/2) - (a + b + c - d/2)
= -1/2(c + d)

Now c + d = - (a + b) (using part i)
So MN = QP

Follow a similar argument to prove that NP = MQ, and then the proof is complete.