DAY 53

Comment

This item involves vectors. If you are hazy about them or have not met them before you should still be able to attempt the item.
You can get from B to E by going from B to C to D to E.
This is 3v - u - ... ,
which is ... .

Answer

v - u..

Readers' methods

Des Burns, Inverness:
In my diagram, B to E is 1 step up (v) then 1 step left (-u),
or v - u.

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