the circle whose eq. are x2 +y2 +c2=2ax and x2 +y2 +c2-2by=0 will touch another externally if


a. 1/b2 +1/c2 =1/a2


b. 1/b2 =1/c2 +1/a2


c. 1/a2 +1/b2 =1/c2

2 years ago

Share

Answers : (3)

                                        

Answer is c)

2 years ago
                                        

HOW?

2 years ago
                                        

is it right or not?

2 years ago

Post Your Answer

More Questions On Analytical Geometry

Ask Experts

Have any Question? Ask Experts
Post Question
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!!
Click Here for details
TO find the centre of any conic we differentiate wwrt x keeping y const. and differentiate wrt y keeping x const. We get 2 linear equations. We solve to find centre. What do those 2...
 
 
Those two equations represent the axis of conic. Thanks & Regards Sunil Raikwar askIITians faculty
 
sunil raikwar 5 months ago
If the lines 3x – 4y + 4 = 0 and 6x - 8y - 7 = 0 are tangents to a circle, then the radius of the circle is
 
 
Hello Student, Since both lines are parallel & tangent to the circle. Then distance between these two lines must be the diameter of the circle. Lines: R=d/2 Thanks & Regards Arun...
  img
Arun Kumar 2 months ago
find orthocenter of triangle A(2^(1/2) 3) B(3,3) C(5^(1/2),6) where circumcenter is (0,0)
 
 
Pl. check this problem. The circumcentre for the given triangle cannot be (0,0). Also, for finding orthocentre, circumcentre is not required.
 
Y RAJYALAKSHMI 10 days ago
Why do we call any term raised to the power 2 as ‘Square’ and power 3 as ‘Cube’? What is the logic behind naming it so?
 
 
the powers represents the dimensions of different polygons
 
kishore 4 days ago
f(x).f(y)=f(x+y) find f(x)
 
 
Hello Student, Thanks & Regards Arun Kumar Btech, IIT Delhi Askiitians Faculty
  img
Arun Kumar one month ago
a bird is at a point P coordinated (4m, -1m, 5m). the bird observes two points A and B having coordinates (-1m, 2m, 0m) and (1m, 1m, 4m) respectively. at time t=0, it starts flying in a...
 
 
Equation of plane with three points x - x 1 y - y 1 z - z 1 = 0 x 2 - x 1 y 2 - y 1 z 2 - z 1 x 3 - x 1 y 3 - y 1 z 3 - z 1 x - 4 y - (-1) z - 5 = 0 (-1) - 4 2 - (-1) 0 - 5 1 - 4 1 - (-1) 4...
  img
Arun Kumar 3 months ago
 
Equation of plane with three points a - b ={ a x - b x ; a y - b y ; a z - b z }={(-1)-1;2-1;0-4}={-2;1;-4} Lets a x,y,z lies on the line perpendicular to AB and in the plane then...
  img
Arun Kumar 3 months ago
View all Questions »