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Math 12 Chapter 6
Conic Section
Test - 5
1.
Equation of latus-rectum of parabola y
2
= 4ax is:
a) y = a
b) x = -a
c) x = a
d) y = -a
2.
Eccentricity of ellipse x
2
/a
2
+ y
2
/b
2
= 1 is:
a) e = c/a
b) e = a/c
c) -c/a
d) e = -a/c
3.
If eccentricity e @ 1 then conic is:
a) Circle
b) Parabola
c) Ellipse
d) Hyperbola
4.
The directrix of the parabola y
2
= 8x is:
a) x-4
b) x-2 = 0
c) x+4 = 0
d) x+2 = 0
5.
The focus of parabola x
2
+4ay is:
a) (a,0)
b) (0,0)
c) (0,-a)
d) (0,a)
6.
Axis of parabola (x-h)
2
= 4a(y-k) is:
a) x = h
b) x = -h
c) y = k
d) y = -x
7.
The vertex of the parabola y
2
= 8ax is:
a) (2,0)
b) (0,2)
c) (0,0)
d) (2,2)
8.
The equ. of the parabola with focus (-3,1) & directrix x = 3 is tangent at the vertex of parabola y
2
= 4ax is:
a) (y-1)
2
= -12x
b) (y+1)
2
= 12x
c) (y-1)
2
= 12x
d) (y+1)
2
= -12x
9.
Standard form of an equ. of ellipse is:
a) x
2
+ a
2
= r
2
b) x
2
/a
2
+ y
2
/b
2
= 1
c) x
2
/a
2
- y
2
/b
2
= 1
d) x
2
/b
2
+ y
2
/a
2
= 1
10.
Tangent at the vertex of parabola y
2
= 4ax is:
a) y = a
b) x = 0
c) x = a
d) y = 0
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