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Show that the following points whose pos...

Show that the following points whose position vectors are given are collinear :
(i) 5 `hat(i) + 5 hat(k), 2 hat(i) + hat(j) + 3 hat(k) and - 4 hat(i) + 3 hat(j) - hat(k)`
(ii) ` - 2 hat(i) + 3 hat(j) + 5 hat(k), hat(i) + 2 hat(j) + 3 hat(k) and 7 hat(i) - hat(k)` .

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