Question

If focus of the parabola is (-4,0 ) and vertex at ( 0,0 ) then length of latus rectum is
4 units
8 units
12 units
16 units

Answer 1

Answer:

Length of Latus rectum = 4 × a = 4 × 4 = 16 units

Step-by-step explanation:

Focus = (-4, 0)

so equation of parabola is y^2 = - 4ax having focus (-a, 0)

so on comparing, a = 4

so length of Latus rectum = 4a = 4×4 = 16 units