Show that the vectors $a, b$ and $c$ are coplanar if $a + b, b + c$ and $c + a$ are coplanar.

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Show that the vectors

a, b

and

c

are coplanar if

a + b, b + c

and

c + a

are coplanar.

9 mins ago

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9 mins ago

Question Text

Show that the vectors

a, b

and

c

are coplanar if

a + b, b + c

and

c + a

are coplanar.

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