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Naga Nandhini
Subject: Maths
, asked on 22/1/18
find the equation of circle ,2x2+2y2-x=0
Answer
2
Dharunika Vijayakumar
Subject: Maths
, asked on 17/1/18
$6.IfPisapointontheellipse\frac{{x}^{2}}{16}+\frac{{y}^{2}}{25}=1whosefociareSandS\text{'},thenfindthevalueofPS+PS\text{'}.$
(Answer:- PS+PS'=2a Ans. 10)
Answer
3
Rishika Malhotra
Subject: Maths
, asked on 9/1/18
What is the equation of this parabola?
Answer
1
Pragati Gupta
Subject: Maths
, asked on 9/1/18
the chords of contact of pair of tangents to circle x
^{2}
+y
^{2}
=1 drawn from any point on line 2x+y=4 pass through the pt (h,k) . find this pt (h,k)
Answer
1
Krithikha B
Subject: Maths
, asked on 2/1/18
.Find the equation of the parabola whose vertex is at ( 2, 1 ) and the directrix is x = y – 1
Answer
1
Sarthak Manojkumar Jaiswal
Subject: Maths
, asked on 31/12/17
From a point P tangent is drawn to the circle x
^{2}
+y
^{2}
=a
^{2}
tangent is drawn to the circle x
^{2}
+y
^{2}
=b
^{2}
.If these tangent are perpendicular ,then locus of P is :
(A)x
^{2}
+y
^{2}
=a
^{2}
+b
^{2}
(B)x
^{2}
+y
^{2}
=a
^{2}
- b
^{2}
(C)x
^{2}
+y
^{2}
=(a
b)
^{2}
(D)x
^{2}
+y
^{2}
=a+b
Answer
1
Chetan
Subject: Maths
, asked on 27/12/17
find equation of circle which passes through (7,3) and centre lies on the line y=x-1 and has radius 3 units
Answer
1
Arshia Sharma
Subject: Maths
, asked on 23/12/17
What is the general equation of conics? Plz tell me the value of 'h' and 'e' for each conic..
Answer
1
Priyanka
Subject: Maths
, asked on 22/12/17
Solve this :
Answer
1
Anika Kapoor
Subject: Maths
, asked on 21/12/17
Q.9
Answer
1
Anika Kapoor
Subject: Maths
, asked on 21/12/17
Q.8
Answer
1
Athul Vincent
Subject: Maths
, asked on 19/12/17
Prove that the circles
${x}^{2}+{y}^{2}+24ux+2vy=0\mathrm{and}{x}^{2}+{y}^{2}+2{u}_{1}x+2{v}_{1}y=0$
touch each other if 12
uv
_{1}
=
u
_{1}
v
.
Answer
1
Athul Vincent
Subject: Maths
, asked on 19/12/17
Q. If two curves ax
^{2}
+2hxy+by
^{2}
+2gx+2fy+c = 0 and a'x
^{2}
+2h'xy+b'y
^{2}
+2g'x+2f ' y +c ' = 0 intersect in four concyclic points then prove that a-b/h = a'-b'/h'
Answer
1
Harsh Anand
Subject: Maths
, asked on 14/12/17
If P(x1,y1), Q(x2,y2) R(x3,y3) S(x4,y4) are four concyclic points on the rectangular hyperbola xy=c^2 then the coordinates of orthocenter of Triangle
Answer
1
Athul Vincent
Subject: Maths
, asked on 12/12/17
In the picture attached , you can see that the two equations have been made "Homogeneous" . 1. When can we say that two equations are homogeneous? 2. How can we make two equations homogeneous?3. Why is that 2(gy+fx) is multiplied by the term once while c is multiplied twice?
$a{x}^{2}+2hxy+b{y}^{2}+2gx+2fyc=0.......\left(i\right)\phantom{\rule{0ex}{0ex}}andstraightlinebe\phantom{\rule{0ex}{0ex}}lx+my+n=0..............\left(ii\right)\phantom{\rule{0ex}{0ex}}NowjointequationoflineOPandOQjoiningtheoriginandpointsof\phantom{\rule{0ex}{0ex}}intersectionPandQcanbeobtainedbymakingtheequation\left(i\right)\phantom{\rule{0ex}{0ex}}homogenouswiththehelpofequationoftheline.Thusrequireclequation\phantom{\rule{0ex}{0ex}}isgivenby\phantom{\rule{0ex}{0ex}}a{x}^{2}+2hxy+b{y}^{2}+2\left(gx+fy\right)\left(\frac{lx+my}{-n}\right)+c{\left(\frac{lx+my}{-n}\right)}^{2}=0$
Answer
1
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(Answer:- PS+PS'=2a Ans. 10)

^{2}+y^{2}=1 drawn from any point on line 2x+y=4 pass through the pt (h,k) . find this pt (h,k)^{2}+y^{2}=a^{2}tangent is drawn to the circle x^{2}+y^{2}=b^{2}.If these tangent are perpendicular ,then locus of P is :(A)x

^{2}+y^{2}=a^{2}+b^{2}(B)x

^{2}+y^{2}=a^{2}- b^{2}(C)x

^{2}+y^{2}=(ab)^{2}(D)x

^{2}+y^{2}=a+buv_{1}=u_{1}v.^{2}+2hxy+by^{2}+2gx+2fy+c = 0 and a'x^{2}+2h'xy+b'y^{2}+2g'x+2f ' y +c ' = 0 intersect in four concyclic points then prove that a-b/h = a'-b'/h'$a{x}^{2}+2hxy+b{y}^{2}+2gx+2fyc=0.......\left(i\right)\phantom{\rule{0ex}{0ex}}andstraightlinebe\phantom{\rule{0ex}{0ex}}lx+my+n=0..............\left(ii\right)\phantom{\rule{0ex}{0ex}}NowjointequationoflineOPandOQjoiningtheoriginandpointsof\phantom{\rule{0ex}{0ex}}intersectionPandQcanbeobtainedbymakingtheequation\left(i\right)\phantom{\rule{0ex}{0ex}}homogenouswiththehelpofequationoftheline.Thusrequireclequation\phantom{\rule{0ex}{0ex}}isgivenby\phantom{\rule{0ex}{0ex}}a{x}^{2}+2hxy+b{y}^{2}+2\left(gx+fy\right)\left(\frac{lx+my}{-n}\right)+c{\left(\frac{lx+my}{-n}\right)}^{2}=0$