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1. ORST is a parallelogram, U is the midpoint of RS and V is the midpoint of ST. RElative to the origin O,r,s,t,u,v are posn vectors of R,S,T,U,V respectively.
Express v in terms of s and t.

I think v=t+[s/2] and yet the book says [t+s]/2. Why? I mean to get to point V you still have to go the whole length of t, but only half way along ts.
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2. v = t + r/2, not t+s/2, look at the vector OS.
3. the question says write thw answer in terms of s and t tho....and then back of the book shows [t+s]/2!
the question says write thw answer in terms of s and t tho....and then back of the book shows [t+s]/2!
Ok, well can u see that it is (t+s)/2?
5. Do u agree that
v = t + r/2?

If so, then see that
s = OR + RS = r+t

r = s-t

So that
v = t + r/2 = t + (s-t)/2 = (s+t)/2
6. (Original post by JamesF)
Do u agree that
v = t + r/2?

If so, then see that
s = OR + RS = r+t

r = s-t

So that
v = t + r/2 = t + (s-t)/2 = (s+t)/2
ahh i see whta you mean....thanks james. s is OS rather than TS

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