3. Addition and subtraction of vectors (page 4)

3. Addition and subtraction of vectors


Adding a vector to its negative	Page 4 of 7

To add u to -u, place the tail of -u = ---> AO at the head of u = - --> OA .

Then u + (-u) = -O-->O = 0, the zero vector. By the commutative law,

u + (- u) = - u + u = 0.

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