Find the equation of the parabola whose: (i) focus is \( (3,0) \) and the directrix is \( 3 x+4 ...

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Find the equation of the parabola whose:
(i) focus is \( (3,0) \) and the directrix is \( 3 x+4 y=1 \)
(ii) focus is \( (1,1) \) and the directrix is \( x+y+1=0 \)
(iii) focus is \( (0,0) \) and the directrix \( 2 x-y-1=0 \)
(iv) focus is \( (2,3) \) and the directrix \( x-4 y+3=0 \).
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