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## Main Question or Discussion Point

An orthogonal basis set spanning R4 has four vectors, v1, v2, v3 and v4.

If v1 and v2 are

[ −1 2 3 0 ] and [−1 1 −1 0 ]

ﬁnd v3 and v4.

Please explain this in a very simple way.

If v1 and v2 are

[ −1 2 3 0 ] and [−1 1 −1 0 ]

ﬁnd v3 and v4.

Please explain this in a very simple way.