[" If the circles "],[x^(2)+y^(2)-2 lambda x-2y-7=0" ,and "],[3(x^(2)+y^(2))-8x+29y=0" are "],[" orthogonal,then "lambda=]

If the circles x^(2) + y^(2) - 2lambda x - 2y - 7 = 0 and 3(x^(2) + y^(2)) - 8x + 29y = 0 are orthogonal then lambda =

The two circles x^(2)+y^(2)-2x-2y-7=0 and 3(x^(2)+y^(2))-8x+29y=0

The two circles x^(2)+y^(2)-2x-2y-7=0 and 3(x^(2)+y^(2))-8x+29y=0

For the circles x^(2) + y^(2) - 2x + 3y + k = 0 and x^(2) + y^(2) + 8x - 6y - 7 = 0 to cut each other orthogonally the value of k must be

If the angle between the circles x^(2) +y^(2) +4x - 5 = 0 and x^(2) +y^(2) +2lambda y- 4 = 0 "is" (pi)/(3), " then " lambda =

The value of lambda for which the circle x^(2)+y^(2)+2lambdax+6y+1=0 intersects the circle x^(2)+y^(2)+4x+2y=0 orthogonally, is