1
Q
parabola equation
A
y squared = 4ax
2
Q
parametric equations of a parabola
A
x = a t squared / y =2at
3
Q
coordinates of focus of parabola
A
(a,0)
4
Q
directrix of parabola
A
x+a=0
5
Q
rectangular parabola equation
A
xy = c squared
6
Q
parametric equations of rectangular parabola
A
x = ct / y= c/t
7
Q
what 2 techniques do you use to find the gradient of any point in a parabola?
A
parametric and implicit differentiation
8
Q
parametric differentiation
A
dy/dx = dy/dt / dx/dt
9
Q
implicit differentiation
A
when differentiating both x and y at the same time
edexcel a level mathematics S&M
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