In each of the following questions, find the coordinates of the focus, the equation of the directrix axis of the parabola and length of the latusrectum.
(i) x^ = -6y
(ii) x^= -20y
(iii) x^= 36y
(iv) y^ = -16x
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Subtracting a fraction from a whole
Rewrite the whole as a fraction using t2 as the denominator :
t t • t2
t = — = ——————
1 t2
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole
Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator.
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