# Adding vectors in space

The components of a vector

**PQ**are the differences of the corresponding coordinates of*Q*and*P*, respectively. The components of**PQ**can be also considered as the components of the difference**OQ**-**OP**of the position vectors of*P*and*Q*, respectively. This kind of dual interpretation comes especially handy when vector-valued functions are used to describe curves in space.## New Resources

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