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By using properties of determinants. Sho...

By using properties of determinants. Show that: (i) `|x+4 2x2x2xx+4 2x2x2xx+4|=(5x-4)(4-x)^2` (ii) `|y+k y y y y+k y y y y+k|=k^2(2ydotk)^2`

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