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Find the rank of the following matrices ...

Find the rank of the following matrices by minor method:
(i) `[{:(2,-4),(-1,2):}]` (ii) `[{:(-1,3),(4,-7),(3,-4):}]` (iii) `[{:(1,-2,-1,0),(4,-6,-3,1):}]` (iv) `[{:(1,-2,3),(2,4,-6),(5,1,-1):}]` (v) `[{:(0,1,2,1),(0,2,4,3),(8,1,0,2):}]`

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