If `x/a+y/b=1` and `x/c+y/d=1` intersects the circle at four concyclic points and `a^2+c^2=b^2+d^2`. these lines intersects at

If (x/a)+(y/b)=1 and (x/c)+(y/d)=1 intersect the axes at four concylic points and a^2+c^2=b^2+d^2, then these lines can intersect at, (a , b , c , d >0)

If (x/a)+(y/b)=1 and (x/c)+(y/d)=1 intersect the axes at four concylic points and a^2+c^2=b^2+d^2, then these lines can intersect at, (a , b , c , d >0)

If (x/a)+(y/b)=1 and (x/c)+(y/d)=1 intersect the axes at four concylic points and a^2+c^2=b^2+d^2, then these lines can intersect at, (a , b , c , d >0) (1,1) (b) (1,-1) (2,-2) (d) (3,3)

If ((x)/(a))+((y)/(b))=1 and ((x)/(c))+((y)/(d))=1 intersect the axes at four concylic points and a^(2)+c^(2)=b^(2)+d^(2), then these lines can intersect at,(a,b,c,d>0)(1,1)(b)(1,-1)(2,-2)(d)(3,3)

The line x+2y=a intersects the circle x^(2)+y^(2)=4 at two distinct points A and B Another line 12x-6y-41=0 intersects the circle x^(2)+y^(2)-4x-2y+1=0 at two C and D. The value of a' for which the points A,B,C and D are concyclic-

The line x + 2y = a intersects the circle x^2 + y^2 = 4 at two distinct points A and B Another line 12x - 6y - 41 = 0 intersects the circle x^2 + y^2 - 4x - 2y + 1 = 0 at two C and D . The value of 'a' for which the points A,B,C and D are concyclic -

The line x + 2y = a intersects the circle x^2 + y^2 = 4 at two distinct points A and B Another line 12x - 6y - 41 = 0 intersects the circle x^2 + y^2 - 4x - 2y + 1 = 0 at two C and D . The value of 'a' for which the points A,B,C and D are concyclic -

The line x+2y+a=0 intersects the circle x^2+y^2-4=0 at two distinct points A and B. Another line 12x-6y-41=0 intersects the circle x^2+y^2-4x-2y+1=0 at two distincts points C and D. The value of 'a' so that the line x+2y+a=0 intersects the circle x^2+y^2-4=0 at two distinct points A and B is

If the lines 2x-y+11=0, x-2y+3=0 intersect the coordinate axes in four concyclic points the centre of the circle passing through these four points is