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Arshia Sharma
Subject: Maths
, asked on 12/11/17
Ques 20
Answer
1
Arshia Sharma
Subject: Maths
, asked on 12/11/17
Q
.
T
h
e
m
i
d
p
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i
n
t
o
f
c
h
o
r
d
b
y
t
h
e
c
i
r
c
l
e
x
2
+
y
2
=
16
o
n
t
h
e
l
i
n
e
x
+
y
+
1
=
0
i
s
(a)
1
2
,
1
2
(b)
-
1
2
,
-
1
2
(c)
1
2
,
-
3
2
(d)
3
4
,
-
7
4
Answer
2
Kshitiz Anand
Subject: Maths
, asked on 11/11/17
Q no15
Q15. If P
1
and P
2
are the lengths of the perpendiculars from any points on an ellipse to the major and minor axis and if a and b are lengths of semi-major and semi-minor axis respectively, then
(
A
)
P
1
2
a
2
+
P
2
2
b
2
=
1
(
B
)
P
1
2
b
2
+
P
2
2
a
2
=
1
(
C
)
a
2
P
1
2
+
b
2
P
2
2
=
1
(
D
)
a
2
P
2
2
+
b
2
P
1
2
=
1
Answer
1
Kshitiz Anand
Subject: Maths
, asked on 11/11/17
Q no 14 ans is c
14
.
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x
2
a
2
+
y
2
b
2
=
1
.
I
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tan
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P
i
s
(
a
>
b
)
A
)
x
2
+
y
2
=
a
2
+
b
2
B
)
x
2
+
y
2
=
a
2
-
b
2
C
)
x
2
-
y
2
=
a
2
-
b
2
D
)
x
2
=
y
2
Answer
1
Kshitiz Anand
Subject: Maths
, asked on 10/11/17
I
f
tan
g
e
n
t
s
P
Q
a
n
d
P
R
a
r
e
d
r
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m
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p
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t
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n
t
h
e
c
i
r
c
l
e
x
2
+
y
2
=
25
t
o
t
h
e
e
l
l
i
p
s
e
x
2
16
+
y
2
b
2
=
1
,
(
b
<
4
)
s
o
t
h
a
t
t
h
e
f
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r
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l
e
log
r
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m
P
Q
S
R
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s
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c
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r
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m
c
i
r
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f
∆
P
Q
R
,
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c
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l
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e
(
Q
a
n
d
R
a
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t
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c
i
r
c
l
e
)
i
s
(
A
)
5
/
4
(
B
)
7
/
3
(
C
)
7
/
4
(
D
)
5
/
3
Answer
1
Kshitiz Anand
Subject: Maths
, asked on 9/11/17
Q no9 ans is option b
A tangent to the ellipse 4x2+9y2=36 is cut by the tangent at the extremities of the major axis at T and T'. The circle on TT' as diameter passes through the point
(A) (0-
5) (B) (
5, 0 )
(C) (0,0) (D) (3,2)
Answer
1
Ritika Dhiman
Subject: Maths
, asked on 8/11/17
Find centre and radius of the circle 3x^2 +3y^2 +4x -6y -4=0
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 7/11/17
the normal at one end of latus rectum of the parabola y^2 = 4ax meets the x-axis at A. Prove that the length of the chord through A and perpindicular to the normal is 8a root2
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 7/11/17
find points on the parabola at which the tangent is parallel to the normal at the point (at^2 , 2at)
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 7/11/17
find the length of the chord cut from the line x+y=8 by the parabola x^2 = 4y
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 7/11/17
the tangents to the parabola y^2 = 4ax at P (at
1
2
, 2at
1
) and Q (at
2
2
, 2at
2
) intersect at R. Prove tha area of triangle PQR is (1/2) a^2 (t1 - t2)^3
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 5/11/17
Pls solve question no. XIV
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 5/11/17
Pls solve question no. VI
Answer
1
Vibhansh Agarwal
Subject: Maths
, asked on 3/11/17
Solve this:
Two parabola have the focus (3, -2). Their directions are the x-axis, and the y-axis respectively. Then the slope of their common chord is:
(
A
)
-
1
(
B
)
-
1
2
(
C
)
-
3
2
(
D
)
1
2
Answer
2
Vibhansh Agarwal
Subject: Maths
, asked on 3/11/17
Pls solve question no. 7
Q7. Find the equation of the common tangent to the parabolas y
2
= 4ax and x
2
= 4by.
Answer
2
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What are you looking for?
(a) (b)
(c) (d)
Q15. If P1 and P2 are the lengths of the perpendiculars from any points on an ellipse to the major and minor axis and if a and b are lengths of semi-major and semi-minor axis respectively, then
A tangent to the ellipse 4x2+9y2=36 is cut by the tangent at the extremities of the major axis at T and T'. The circle on TT' as diameter passes through the point
(A) (0-5) (B) ( 5, 0 )
(C) (0,0) (D) (3,2)
Two parabola have the focus (3, -2). Their directions are the x-axis, and the y-axis respectively. Then the slope of their common chord is:
Q7. Find the equation of the common tangent to the parabolas y2 = 4ax and x2 = 4by.