JEE MAIN - Mathematics (2021 - 31st August Morning Shift - No. 11)
The length of the latus rectum of a parabola, whose vertex and focus are on the positive x-axis at a distance R and S (> R) respectively from the origin, is :
4(S + R)
2(S $$-$$ R)
4(S $$-$$ R)
2(S + R)
Explanation
_31st_August_Morning_Shift_en_11_1.png)
V $$\to$$ Vertex
F $$\to$$ focus
VF = S $$-$$ R
So, latus rectum = 4(S $$-$$ R)
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