I went about doing this (proving the vectors are linearly dependent...) and this is what I got:

It is a known fact that a 'n x m' matrix is linearly dependent if m > n ... so we have to show WHY ... by definition, if a system of vectors are linearly dependent, then there is at least one linear combination of one vector and another. We know that

rearrange to make v_3 the subject =>

, so long as

doesn't equal zero ... I then substitute the equations i found earlier that are part of the solution set...And then because

only needs to be a combination of 1 or more other vector, I've selected that

and

. And now the equation is in terms of

and

. Is this correct?