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If the line x-1 is the dirctrix of the parabola y^2-Kx+2K=0,then one of the value of K is:
(a) 1/6 , (b) 8 , (c) 4 , (d)1/4 ??
sry its x-1=0 If the line x-1=0 is the dirctrix of the parabola y^2-Kx+2K=0,then one of the value of K is: (a) 1/6 , (b) 8 , (c) 4 , (d)1/4 ??
If the line x-1=0 is the dirctrix of the parabola y^2-Kx+2K=0,then one of the value of K is:
Dear Tanvi Dasaur
Given parabola
y2-Kx+2K=0
or y2 =4(K/4)(x-2)
now compair it with standard form y2=4ax
we know that equation of directrix is x=-a
for this case
x-2 = -K/4
or x= 2-K/4
given directrix is x=1
equate both
2-K/4 =1
so K=4
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