The equation of parabola whose vertex and focus lie on the axis of \( x \) at distances \( a \) ...
The equation of parabola whose vertex and focus lie on the axis of \( x \) at distances \( a \) and \( a_{1} \) from the origin
P respectively, is
W
(a) \( y^{2}=4\left(a_{1}-a\right) x \)
(b) \( y^{2}=4\left(a_{1}-a\right)(x-a) \)
(c) \( y^{2}=4\left(a_{1}-a\right)\left(x-a_{1}\right) \)
(d) \( y^{2}=4 a a_{1} x \)
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