(i) Find the value of k for which x=1 is...

(i) Find the value of k for which x=1 is a root of the equation `x^(2)+kx+3=0.` Also, find the other root.
(ii) Find the values of a and b for which `x=(3)/(4)" and "x=-2` are the roots of the equation `ax^(2)+bx-6=0.`

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