SOLUTION: a rectangle labeled abcd counter clockwise. point E lies on the diagonal ac such that ae:ac is 4:5. point f lies on the midpoint of cd. express ef in terms of the position vectors

Question 1008551: a rectangle labeled abcd counter clockwise. point E lies on the diagonal ac such that ae:ac is 4:5. point f lies on the midpoint of cd. express ef in terms of the position vectors oa, ob, oc, and od
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!

.
.
.

Substituting from above,

But you know that

So,

and,

So,

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