Express the vector r~ a b c d p r in terms of a~ , b~ , c~ , and d~ , the edges of a parallelogram.

Given the vector .

Now taking the vertices of parallelogram asA .

As we know to find the edges of parallelogram ABCD,we proceed as follows

= Position vector of B - Position vector of A

= Position vector of C - Position vector of B

                            =

= Position vector of D - Position vector of C

                           =

= Position vector of A - Position vector of D

                       =

So, are edges of parallelogram.

idk the answer but just put a

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